Electrical Wiring

The compass needle is a magnet and as you have probably tried, a magnet will 'stick' to an Iron bar.

Thus as you move the compass near the Iron, its magnetic field lines are bent by the Iron and become locally stronger than the field lines of the planet, deflecting the needle away from north.

If the bell rings continuously in a circuit, it typically indicates that the circuit is closed and current is flowing uninterrupted. This could be due to a switch being stuck in the "on" position or a short circuit in the wiring. It is important to investigate and fix the issue to prevent overheating or damage to the circuit.

In North America the most common distribution for new homes is 200 amps. Services larger than 200 amps have to get written permission from the utility company. Along with approved drawings that have load calculation filled in as to the exact connected load. In my work career I have only installed one 400 amp service in a very large home.

An earth magnet will stick to any iron content that anything contains. There are manufacturers of cast brass figurines, from countries such as India, that mix their alloys differently than we do here, and yes a very strong magnet will stick to it. Only slightly, but it will stick to it. An object made with a casting method that can readily be identified by examining the underside as brass, if from India from the 1970s or before, is going to stick to an earth magnet, probably because it has an iron content. Those that say that if a magnet sticks to brass it is brass plated, are categorically wrong. Plating something with brass, is economically absurd. Cladding something with brass is obvious even to the unaware.

Brass, like bronze, is an alloy. Copper is mixed with combinations of zinc, and has in some cases been mixed with lead, iron, arsenic, aluminum as well to make brass. You will even find artifacts from Asia that are constructed from something called "5 metal." And yes, you bet the earth magnet will stick to it a little. When this combination was made the word "plate" meant what you served on.

Broad question.... Never become the path to ground, If the electricity flows across your heart, little as .4 milli amps could stop your heart. If you know its hot or energized and you have to work it hot have someone there with you and make them aware of the hazard and what to do.... worse case scenario. Rule of thumbs is... if your not qualified and more than aware of your actions, pay a little money for a expert and save your family a lot of suffering.

It is possible that Kirchoff's law will answer this question. But why make it hard? It is customary to find the polarity of a circuit by simple inspection. Let's do a basic circuit and see how it works. Draw a square. Put a battery in the left side, and put the positive terminal down and the negative terminal up. Put a resistor in the right side. Two components - a simple series circuit. The battery will be "sending out" electrons from the negative terminal (the top one), and it will be "collecting them in" at the positive terminal (the bottom one). Put a "-" by the top of the battery to label that terminal. Now put a "+" by the bottom terminal. You've specified the polarities. Anyone looking at the circuit now can "find the polarity" of the circuit by inspection. Let's go one step farther. The electrons will be flowing out the top of the battery, and over and down through our resistor. Then they'll flow out the bottom of the resistor and across and into the bottom of the battery. Very simple, very easy. Now focus on this. The polarity of the voltage drop across the resistor is negative on the top and positive on the bottom. The end of the resistor into which current flows is said to be the negative end of the component, and the end out of which the electrons flow is said to be the positive end. Is this clear? Electrons flow out the negative terminal of a battery, and electrons flow into the negative end of our resistor. Be super clear about this. That's the way voltages are labeled in a circuit diagram. (The resistor "drops" voltage, while the battery represents a voltage "rise" in circuits.) For our circuit, the voltage drop across the resistor, which can be though of as the measure of voltage across the resistor, is negative on top and positive on the bottom. If you were going to measure the voltage drop across the resistor, the black meter lead would be on top of that resistor and the red lead would be on the bottom. If anyone encounters the circuit, the polarity will be obvious by inspection. We must be given a voltage somewhere, or we must be given a direction of current flow so we can make our inspection and determine polarity. If we were given nothing about our circuit except the direction of current flow, we'd know the rest by inspection. Take the simple circuit we made and take off all references to polarity. Now draw an arrow parallel to the top line of the circuit, and make it point to the right. If that arrow represents the direction of current flow, it would be telling us current was flowing clockwise around our square circuit. The polarities of all the other components (there are only two) would then be known. We would know by simply looking at the circuit what was happening, know by inspection. [This answer has a couple of simplifications, but not where it makes any difference. The answer was designed to supply fundamental knowledge or introductory information. It is unnecessary to say, for instance, that modern digital multimeters (DMMs) will measure voltage no matter what lead is placed where - the only difference being whether on not the "minus" sign appears on the DMM's display. Save that for later. We're keeping this simple.]

Nuclear energy is not stored in the traditional sense, like electricity in a battery. Nuclear energy is generated through nuclear reactions in a nuclear reactor. The heat produced during these reactions can be converted into electricity and stored in the power grid.

Grounding may be an issue. Have you replaced any coper pipe with plastic, polly or PEX pipe of any kind? if so you will need to add a bonding jumper at the beginningto theend of the plastick pipe. If not, first check to see if there is a ground wire at the water service main entrance. Next see if it is continouse past all couplers and valves and conected to the other side,including the PRV. Also check to see if there is a bonding (grounding) wire at the water heater from the cold to the hot side of the water heater. Hope this helps Terry

electric shock is a physiological symptom caused by an electric current flowing though the body. the current causes heating and, at higher levels, burns, and eventually death.

The bare wire has an electric potential of some substantial voltage above ground. This potential causes a current to flow through your body to ground. if some other part of your body is not connected to ground, no current will flow. The current causes burning in your blood stream, your nervous system, and in you tissue.

the current that flows through your body needs to be above about 10mA for you to perceive it as a shock. The voltage required to produce this current, by ohms law, depends upon the resistance between the point of contact and ground.

Voltage is a measure of the electrical potential difference between two points in a circuit, which determines the force that drives electric current through a conductor. It is measured in volts and represents the amount of energy required to move a unit charge between the two points.

Most watch batteries produce about 3 volts but cannot supply much current. This is ok because the motor inside a watch only needs a tiny amount of current.

An AAA cell produces about 1.5 volts but can supply a lot more current than a watch battery. The amount of current it can give depends on what type of AAA cell it is. (Some cells are Zinc/Carbon, others are Alkaline, Lithium, etc.)

But use the volume as a rough guide. Other things being equal, volume should be proportional to energy stored.

If you need an exact , you will have to resort to experimentation. Get some of the exact type and brand of battery you want to compare, put loads (resistors) on them and measure output voltage versus time.

When the current increases as a voltage is applied to the bulb it causes the bulb's special wire filament to get so hot that it glows very brightly. The heating causes changes in the normal electron lattice of the filament, creating more barriers to the flow of the electrons and therefore the resistance of the wire increases as it gets hotter.

William Gilbert disproved that garlic destroy the magnetic effect of the compass needle?

Something that is good at conducting electricity usually has a high density of free electrons that are able to move easily through the material. Materials like metals, which have a high number of free electrons due to the way their atoms are arranged, are excellent conductors of electricity. Good conductors also tend to have low resistance to the flow of electric current.

A light bulb filament glows when electricity passes through it, causing the filament to heat up and emit light due to incandescence. The high temperature of the filament makes it glow and produce visible light.

Wind is an example of mechanical energy, which is derived from the movement of air molecules. This energy can be harnessed through technologies like wind turbines to generate electricity.

There are many factors that determine what the leakage current will be. You could find out what the insulation winding resistance of the new motor should be and use the 660 volts and Ohm's law to calculate the current. If you measure this using a DC insulation tester however it probably will not yield an exact measurement since the test is not under normal operating conditions, but is a DC voltage test. To get the best measurement you really need to test the motor under operation and use a leakage clamp on the ground connection to see what the current really is since other factors come into play such as the insulation resistance, imbalance and frequency. An example of a tool would be the Fluke 1630 or Fluke 360.

A semiconductor diode allows current to flow in only one direction due to its asymmetric semiconductor junction. When a forward bias voltage is applied across the diode, it allows current to flow freely. However, when a reverse bias voltage is applied, it blocks current flow due to the depletion layer widening and creating a high resistance barrier.

During a phase change, energy is either absorbed or released as heat without causing a change in temperature. This energy is used to break or form intermolecular bonds between molecules, rather than increasing the average kinetic energy of the molecules.

Magnets will stick to materials that contain iron, nickel, or cobalt. Some examples include steel, iron, nickel, and some alloys. Materials like copper, aluminum, and plastic are not attracted to magnets.

Neutrons carry no charge. They are neutral subatomic particles found in the nucleus of an atom alongside protons.

Because it has more free electrons, however note that copper is the second best conductor after silver per-unit-volume. Many people think gold is the best conductor but it is not.

And maybe also because its a Ionic compound so that its electron can move freely in vecant spaces....so that mobile electrons allow electricty and heat ton pass thru the body.

Sorry if i am wrong im just in 8th grade and i am telling what do i know i meant nobody told me anything i have just learned a lil about ionic conpounds n its electrons so its just a hunch..so if i ma wrong then please tell me Thanks^_^

A material that insulates, especially a nonconductor of sound, heat, or electricity. A device that insulates another material or space from something. For instance glass is a good insulator from electricity. The electrons will not flow through glass. Cork is a good insulator from sound. Sound waves have a hard time passing through cork. Wood is a good insulator from heat.

Fluorescent lights glow because of an electric discharge in a glass tube that causes mercury atoms to emit ultraviolet light. The inside of the tube is coated with phosphor, which absorbs the ultraviolet light and then re-emits visible light.

1. Wind a coil of wire around a bobbin to create the coil, which will serve as the moving element of the galvanometer.
2. Attach a pointer or index needle to the coil to indicate the deflection caused by the current passing through the coil.
3. Place the coil and pointer assembly within a magnetic field produced by a permanent magnet to allow for the deflection of the pointer in response to current flow.
4. Connect the coil to a calibrated scale to measure the amount of current based on the deflection of the pointer.