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Electricity and Magnetism

~6000 answered questions
Parent Category: Physics
Electricity and magnetism are ultimately inextricably linked. Electricity is the term given to a group of physical phenomena involving electric charges, their motions, and their effects. Magnetism is the force generated by the passage of an electric current through matter.
Child Electrical Safety The U.S. Consumer Product Safety Commission (CPSC) and the National Electrical Safety Foundation (NESF) are urging consumers to look for and correct electrical safety hazards in their homes. Each year, incidents involving electrical equipment, such as extension cords, outl…
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Electricity comes from many sources. Such as coal power plants, nuclear power plants and renewable energy sources such as wind, solar and hydroelectric dams. There is a great EPA calculator to help you know which sources your electricity comes from and how clean they are: If you live in Minneapo…
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With direct current, the charge flow is distributed throughout the cross-sectional area of a conductor. With alternating current, the charge flow tends to flow towards the surface of a conductor due to what is called the 'skin effect'. The higher the frequency, the greater the skin effect. In fact,…
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The higher the rated wattage of the bulb, the greater the luminous efficacy, which means you get more lumens per watt using a 120-watt bulb than using two 60-watt bulbs. Check the lumen ratings for the two 60 watt bulbs, and compare it with the lumen rating for the 120 watt bulb. That should give y…
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No. The black is 220, the red is 220, and the ground serves as the neutral.   the last answer "no" is correct but the reason is not. the ground is still a ground. the red is 110v and the black is 110v. together they are 220v. the neutral or (common) is for a 110v return. for example a stove o…
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First off, I am NOT an electrician, but I have guts. I just hung a European chandelier and hooked it up to 110 voltage. It works, but it doesn't put out as much light as it would with 220. A more elegant solution would be to take the lamp to a shop and get it rewired. If you want to do it yourself, …
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Answer Yes it can. But leave this work to a qualified electrician. The consequences of doing this improperly range from failure of the cooktop to work, to damage to the cooktop, to an electrical fire, to injury or death due to electrocution. The hazards cannot be stated strongly enough.
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Actually the NEC says that the load on a branch circuit can only be 80% of the breaker size since Some appliances use a more energy to start up. so to be legal, you could only have a 1440W load on a 15 amp circuit, and 2880W with a 240 v 15 amp breaker. Another Answer You really should be asking …
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You need to remove the screw that holds the light ring and pull the whole light fixture out of the water and up onto the deck. There should be enough wire wrapped around the back of the light to allow this. Remove the lens, replace the bulb, and reinstall the lens with a new gasket, being careful no…
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We had a problem,year after year with every bulb we had replaced. My pool contractor would check the electrical current in the switch, in the connections under the plate in the deck, and in the fuse box. He would also check for a current in the bulb everytime. No problem would show up each time but …
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Keep in mind that "electricity" is the flow of electrons through or along a conductor. Anything can be a conductor with a high enough charge. When the charge becomes sufficiently high, or if the static charge climbs rapidly, you will see its effects. You can't "see" electricity in any form. All you …
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Answer Do you maybe mean an 'iron core?' If so, an iron core strenghthens the magnetic field significantly. *If the coils are wound closer together the fluxlines are more dense and increase the strength of the field slightly (an iron core strengthens the field by allowing the magnetic field to p…
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Answer-- The easist way to find nails and other steel is a magnet. Since this question is posted in 'Building and Carpentry / Technology' it begs the question, 'What kinds of metal are you interested in?' Yes, a magnet will help locate most nails and other ferrous metals (steel, iron), but not …
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Change the 6 volt generator to a 12 volt alternator. Replace the starter & battery with a 12 volt. Replace every single bulb on the vehicle with a 12 volt bulb. You may also need to replace the coil. Also replace any electronic devices designed for 6 volts with ones designed for 12 volts.
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Electricity was not 'invented' : its characteristics and uses have been known about and developed over hundreds of years. Static electricity produced by rubbing objects against fur was known to the ancient Greeks, Phoenicians, Parthians and Mesopotamians. Greek philosophers discovered that when ambe…
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That certain objects such as rods of amber could be rubbed with animal fur and attract light objects was known to ancient cultures around the Mediterranean. Thales of Miletos made a series of observations on static electricity around 600 BC By the 1600's, many electricity-related discoveries had bee…
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Although an early form of battery may have been used in antiquity, the modern development of batteries started with the Voltaic pile, invented by the Italian physicist Alessandro Volta in 1800. The widespread use of batteries has created many environmental concerns, such as toxic metal pollution.Man…
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An Amp (ampere) is a unit of measurement for electrical current flow. A Watt is a unit of measurement for electrical power. The relationship between current (Amps) and power (Watts) is generally not well understood. The power (Watts) generated or transmitted by a system is directly proportional to …
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The movement of electrons.   Positively charged particles travelling away from negatively charged ones, in a suitable environment.   Actually, electrons do not move to create electricity. They simply pass a negative charge to positively-charged ions and this movement of charge is electr…
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Take a piece of paper and go through your house and make a note of everything that uses or runs on electricity. Now sit down and try to imagine what your life would be like without all of those things. That is the significance of electricity.
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Advantages1) The major advantage is that it can provide so many devices with power, including such important things as refrigerators, air conditioners, heaters, water heaters, stoves, microwaves. It provides nearly 100% of lighting. It also powers other modern conveniences: washers, dryers, radios, …
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Benjamin Franklin was an early experimenter with electricity. He observed electricity by taking a ordinary kite and tying a key to the bottom of it. He put the key and the kite outside in a lighting storm and when lightning hit the kite it traveled down the string an hit the key with electical force…
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Watts are the product of amps x volts.
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Answer What sort of induction? There are many uses of this word in different maths, sciences and even medical terminology. Webster's Online Dictionary says that this means: 1 a : the act or process of inducting (as into office) b : an initial experience : INITIATION c : the formality by which …
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'Founders' of the Electromagnetic Wave Theory Electromagnetic waves were predicted mathematically by James Clerk Maxwell and later discovered by Heinrich Hertz.
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Many taillight assemblies are equipped with bulbs with dual filaments, one for tail lights and one for brake lights. If you have one bulb with two filaments, then the problem you describe sounds like the brake light filament in the left bulb is burned out but the tail light filament is working.
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Most electricity in the world is produced by burning fossil fuels like coal, oil and natural gas. The heat is usually used to produce steam which turns electric turbines which generate electricity. This energy is called non-renewable, because the fossil fuel can only be used once. Burning fossil fue…
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Electricity is a type of energy which exists when there is a difference in the number of electrons present at two different points, whether the result of static, generation, or magnetic field.It normally represents the flow of these electrons from one point to another, as in a circuit. The energy su…
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Only closed circuits work Lightbulbs get dimmer if you add another lightbulb on the circuit Lightbulbs get brighter if you add a more powerful battery Things that can't conduct electricity are called insulaters Things that can conduct electricity is called electricity conductors
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electromagnetizm!!!!!!!!!!!!!!!!!!!!! No it is not electromagnetism I think it is magnetic fields, North side being negative and South side being positive.... whatever!!!!!!!!!!! =!
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The term "Static electricity" has several different meanings: 1. A field of science also known as "electrostatics" 2. Electrical phenomena involving high voltage at low or zero current. 3. Any Electric charge 4. An imbalance of electric charge occurring on the surface of objects 5. Charge-imba…
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Answer its all about electrical circuits and instruments. its applications in detail,workin of essential devices.It always goes hand in hand with electro-mechanical devices n such related stuff. It depends on the school you are applying to. so it'd be better if you take a look at the 'course plan'. …
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Yes. Larger the magnet greater the magnetism. For example: Both the Sun and the Earth are powerful magnets. But the Sun's magnetism is 100 times greater than the magnetism of Earth. This is because the size of the Sun is also about 100 times greater than the Earth. Another Answer The intensity o…
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William sturgeon
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Electricity Vs Static Electricity The electricity is build up when electrons (negative charged particles of an atom) move in a conductor (eg. metal, wire, water) in a closed loop. This is also known as current. Just like water flow in a set of pipes. Static electricity is somehow the contrar…
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120 Volts (roughly) in the US.
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Electricity is a general term encompassing a variety of phenomena resulting from the presence and flow of electric charge. These include many easily recognizable phenomena, such as lightning, static electricity, and the flow of electrical current in an electrical wire. In addition, electricity encom…
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Answer Yes, electromagnetism is a central factor in the Cathode Ray Tube. An electron emitter at the back of the Cathode Ray Tube (CRT) fires electrons toward the front of the tube. These electrons pass through two sets of parallel metal plates - one set is oriented horizontally and the other ve…
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The strength of an electromagnet depends on -- the magnitude of the electric current in the wire coil, -- the number of turns of wire in the coil, -- the composition of the material in the core surrounded by the coil.
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Yes, although it's easier to generate an electric charge on some cats than others. Also, both cats and dogs can be filled with static electricity especially if they are running around on carpeting. I've had mild shocks off my cat and 2 dogs, although it's not certain where the charge developed.
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The electromagnetic crane has a huge electric magnet that is operated by an electrical current. When the electricity is switched on the magnet becomes magnetized for allowing metal objects to be picked up just like an ordinary magnet, but when electricity is turned off the metal object fall away.
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The term dirty electricity is being used in different contexts: Dirty Electricity is a newly recognized and ubiquitous pollutant, which is also known as electromagnetic interference (EMI). It refers to unusable electrical energy (radio frequencies), which produce harmonics and voltage transients tha…
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Depends on frequency "Electromagnetic flux" is just the amount of energy passing through a surface in the form of electromagnetic waves. The answer to your question depends on the frequency of the electromagnetic waves. Long, slow waves like radio waves can pass through wood, and short, fast wave…
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How a balloon can stick to a wall When you rub a sweater against a balloon, static electricity is produced. When this occurs, the negative ions are transferred to the balloon. When the now entirely negative touches the entirely positive ion wall, the opposites attract, and the balloon is stuck to th…
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Chemical WaterAcid rain is a result of chemicals or pollution in the air being taken to the clouds and atmosphere with the rain that is evaporated from the earth. it forms from the polution in the air... and other polutants on earth that get taken back into the sky
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Answer Just as the flow of water in a river constitutes a current of water, flow of charge, i.e. charges in motion constitue an electric current. - The charged particles whose flow in a definite direction constitutes the electric current are called current carriers.e.g. electrons in conducto…
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Answer you can increase the strength of an electromagnet by: 1) Increasing the current flow 2) Increasing the number of coils 3) Passing an 'iron core' through the coil of the electromagnet
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600 B.C. Thales of Miletus writes about amber becoming charged by rubbing, he described what we now call static electricity. Additionally, this is a discovery and not an invention. Electricity was not invented it is a natural phenomenon just like water and fire. Thomas Edison invented the lightbul…
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No one really "invented" electricity, but you can ask who discovered it. 600 B.C. Thales of Miletus writes about amber becoming charged by rubbing - he was describing what we now call static electricity. 1600 A.C. English scientist, William Gilbert first coined the term "electricity" from the Gree…
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The technological benefits of electricity are just about endless. Without it, there would be no street and home lighting, computer technology, hospitals, cars, home appliances, and a myriad of other things. Electricity is the most neat and clean form of energy. It is environmentally friendly. It…
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yes, due to the ionic charges
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Electricity comes from the Greek root word electra, which means "amber." This comes from an observation made by a Greek philosopher, Thales . As he was polishing a piece of amber with a silk cloth, he noticed that it attracted more dust and hair afterward. Hence the name electricity.
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How Sound can be measured Sound is basically a vibration that touches your ear and makes your ear vibrate so you can hear the sound. Something like a musical instrument or someone tapping their knees makes the air around the object vibrate and the air around the object that is now vibrating keeps g…
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The speed of an electric current is determined according to v = I/nAQ (average speed equals current divided by the number of charged particles moving, the cross-sectional area of the conductor and the charge of the particles). This basically means that a normal current e.g. the current in a house's …
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Salt is considered antibacterial because it restricts bacterial growth in many foods. It preserves foods by lowering the amount of "free" water molecules in foods. Bacteria need moisture in order to thrive, so without enough "free" water, they cannot grow well in foods that contain salt. - Brad. sal…
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There are many ways to get electricity. Batteries are one form, outlets another. But if you want to generate your own electricity, you can use pedal or hand-powered generators, a wind turbine, or a solar panel. Most cars create electricity to power the spark plugs and run the accessories. All forms …
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In general, electricity is the movement of charged particles (this is called "current") as a result of applying an electrical potential (voltage). Yes,electricity's a pretty general term, but so is the term "electricity" as it is used in physics. Generally though, current is moving electrons. Electr…
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Early bulbs were made of glass, blown into a bulb shape, using techniques already common in making glass drinking vessels and ornaments. The filment is inserted at the open end and the glass re-heated to form a seal. The air is drawn out using a suction pump, either attached at the same free end o…
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Any conductor carrying an electric current induces a magnetic field. If the conductor is wrapped around an iron core, the magnetic field produced can be used for many uses. Most people have seen scrap-yard magnets used for picking up iron and steel scrap. Electromagnets are also used as electrical …
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for usa test prep In an electric motor, at the moment that the half-turn of the rotor (central electromagnet) completes, the field of this electromagnet it flips if you think about it, if you put two positive or two negative sides of a magnet together what happens? one flips because they aren't at…
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Electromagnetic Induction mainly deals with the ways that energy is shifted about between Electric and Magnetic fields in various circumstances. Here are some major examples: 1. A moving Electric Current Induces a Magnetic field: Electromagnets. 2. A moving conductor in a magnetic field Induces an …
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The ancient Greeks discovered electricity in 600 BC
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The solenoid is a long cylindrical coil of wire consisting of a large no. of turns bound together very tightly. The solenoid of an automobile is associated with the starter system and transfers an electric current into the starter motor to set the engine into operation. When the ignition key is turn…
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Answer Convex are thicker in the middle and thin out at the edges. These lenses magnify and are used for reading glasses and to correct long-sightedness (hyperopia). Concave lenses are thin in the middle and thick towards the edges. These lenses shrink things and are used to correct short-sighte…
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Micheal Faraday discovered the relationship between magnetic fields and electricity traveling in a wire. This led to the brilliant work of Tesla. He is the father of modern electricity. He invented the shaded pole electric motor. Still the heart of most systems today at the house or factory. Others …
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Static electricity could fry your hard drive or many other parts of your computer. If your messing with the inside of your computer it is smart to get a grounding wire or something to get rid of your electricity before entering the computer.
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Electricity generation using magnets Any time a magnet's flux lines cut past a conductor (wire), a small pulse of electricity is generated. A generator is the same as a motor, except, it's rotor core is rotated by external means (wind, waterfall from a dam, steam and so on). As the rotor rotates,…
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You can make a magnet three ways:No1. Get a metal rod and wrap some Insulated copper wire around it. You can use some other wires but it might not work as well. Make sure the wire isn't too thick. Wrap the wire 50+ times. Connect the two ends of the wire to a battery. Don't connect it to a strong po…
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A magnet is a metalic material that is able to attracts metals such as iron and steel. The end of the magnet are called polenta In sorting the various elements for processing into tools , weapons and jewelry the natural magnetic lodestone was soon near enough to iron for the attraction and repulsio…
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there are rechargeabl batteries that r sold
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no  AnswerIt depends upon what they are made of. Some blackboards (or 'chalkboards', as many are actually dark green!) have a metal backing which allow magnets to be stuck to them.
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there are two types :static electricity and current electricity
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A magnetic force is when a magnetised piece of either iron, steel, nickel or cobalt comes close to either an other magnet or an demagnetised piece of iron, steel, nickel or cobalt. This is measured in newtons a force with which a magnet attracts an object is called magnetic force.it is measured in…
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The invention of the electric motor is credited to Sir Michael Faraday. I think you might find its actually Tesla, Faraday invented the formulas for the math of AC current
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Static Electricity -- A condition that exists when electrons are displaced and remain so. Static electricity is usually the result of friction. Lightning is an example of static electricity. Static electricity makes your hair stand on end. If you take an inflated balloon and rub it on your head, it …
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For current to flow, there must be a complete path from the wire to another wire, or to the ground. The bird is not "grounded" and there is no difference between potentials when it is sitting on one wire.
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Electricity is one of the many forms of energy naturally occurring in the universe. Specifically, electricity is the flow of electrons through a conductor, like a wire. It comes from other forms of energy. In the case of a power plant it comes from burning of fuel, nuclear reactions, rays of sunligh…
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im not sure i think it was in GreeceBenjamin Franklin the electricity was discovered in Greece
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No one made electricity but they discovered it. Electricity was not invented; it occurs naturally and is an important part of keeping our physical universe in balance. Forms of natural electricity include lightning, static electricity, and the reactions of charged particles. However, legend has it t…
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Electricity is the motion of electrons. The electrons of certain substances, particularly metals, are easier to move from one atom to another, and are onsidered good conductors. In order to get the electrons to move (you know make the electricity) you need to apply some impetus to get the electons t…
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batteries, resistors, and switches
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There was plenty of electricity that year.
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the humidity in winter is lower
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Electricity is important because it is the most needs of the human being. It is also responsible for modern technology and inventions.
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Magnetic force is the force exerted between magnetic poles, producing magnetization of force, either of attraction or of repulsion.
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Electricity was not invented; it has always existed. Many, many people worked to identify it and then to develop uses for it.
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Electromagnetic induction is the process of inducing electric current in a coil with the help of a magnet. Whenever a conductor is moved through a magnetic field, or the magnetic field fluctuates in strength (as with an AC electromagnet), a current will be induced in that conductor. Induction cookt…
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faradayAnswer:Electromagnetic Induction was originally discovered in 1802 by Hans Orsted.Hans put a wire with electric current running through it next to a compass and the make the needle move. But Hans didn't know what it means.A decade later, a British scientist named, Michael Faraday, built o…
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There are a number of ways that this can be done, including both direct and indirect methods. The most common way is actually an indirect method. This is how the very large majority of electricity is produced in the world. It is done by burning a chemical fuel to produce heat. The most common fuels …
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There is no such thing as a "unit of electromagnetic". There are several units related to electricity, electromagnetic waves, etc., depending on exactly what aspect you want to measure. For example, in the case of electricity, there are units for voltage, current, intensity, power, frequency, and ot…
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An ammeter must be connected in series. The polarity of the meter leads must be correct. meaning you expect positive current then connect the meter accordigly. the meter impedance must be very relativaly low otherwise that will ad a error.An ammeter is not connected in parallel because it is measure…
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An ammeter is a low voltage voltmeter in parallel with a small resistance resistor. Current flow through the resistor creates a voltage drop across it which is then measured by the voltmeter.
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You can increase the flow rate of a positive displacement pump (like a gear pump) by increasing the input RPM. If it is a D.C. motor, increasing the voltage would make it run faster. An A.C. motor is a little trickier. Certain A.C. motors can be sped up by using a Variable Frequency Drive, others wo…
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the_best_is_silver">the best is silver Silver is better than copper which is better than gold which is better than aluminum. The absolute best would be a super-conductor at a temperature of absolute zero.
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The conversion gain, G, is one of the standard values usually measured and quoted to indicate the performance of a heterodyne or superheterodyne receiver system. G is called a 'gain' because it is a ratio of an output power to an input power. In most practical cases the actual output power is sma…
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Electric charge (or electrical charge) is nothing but property possessed by various particles including the protons and electrons in atoms. Protons always have a positive charge and electrons a negative charge. There are also other particles such as positrons which have a positive charge and anti-…
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Electromagnets are made by wrapping wire around a conductive rod, so that an electromagnetic field is created when current is passed through the wire.CAUTION : Do not use 110-120 volt AC power in any science experiments. This represents a dangerous electrical shock hazard. Use low-voltage DC whereve…
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An induction furnace is an electrical furnace in which the heat is applied by induction heating of a conductive medium (usually a metal) in a crucible placed in a water-cooled alternating current solenoid coil.
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