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An electromagnet can pick up heavy items. A. All the time B. Only when a current is running through it. C. All of the above. D. None of the above?
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Mention types of transmitions media that the world today uses?
Electric current is a transmission medium which can be used to transfer data across a wire for example ( copper wires). Radio waves is a transmission medium which can be used to carry data through the air. The above mention mediums are known as data transmission media.
What are the examples of liturgical music?
christian songs like At the Cross,Through It All,Above All etc.
What is Holden Caulfied's American dream?
holden wants to catch children that are about to fall off the cliff into "adult hood" that cant see where they are going because they are running around in rye that is above their heads
How does tubal ligation use a falope ring?
In this technique, an applicator is inserted through an incision above the bladder and a plastic ring is placed around a loop of the tube.
In sheet music. There are sometimes smaller notes above the treble clef. What are they. And sometimes they have a diagonal line through them?
it means that you should play it strong and have a steady tempo
Is earth an electromagnet?
a part of the earths structure causes it to act like an electromagnet
Why do you use an iron in an electromagnet?
Well... the electromagnet has a magnetic field around it which will then attract the paper clips, depending on how much strength the electromagnet has. Also the current flowing in the coil [wires] will make the nail or the electromagnet magnatise.
How does a fuse or a circuit breaker open a circuit?
In a fuse the conductor, or little piece of wire you see inside the fuse is designed to designate when it heats up above a certain level -- if the current climbs too high, it burns up the wire. Destroying the fuse opens the circuit before the excess current can damage the building wiring. Once a fuse blows it must be replaced with a new one of the same amp rating. The basic circuit breaker consists of a simple switch, connected to either a bimetallic strip or an electromagnet. The hot wire in the circuit connects to the two ends of the switch. When the switch is flipped to the on position, electricity can flow from the bottom terminal, through the electromagnet, up to the moving contact, across to the stationary contact and out to the upper terminal. The electricity magnetizes the electromagnet. Increasing current boosts the electromagnet's magnetic force, and decreasing current lowers the magnetism. When the current jumps to unsafe levels, the electromagnet is strong enough to pull down a metal lever connected to the switch linkage. The entire linkage shifts, tilting the moving contact away from the stationary contact to break the circuit. The electricity shuts off. Resetting the breaker allows current to flow again. Fuses and breakers are there to protect the wiring and not what is plugged into the circuit.
How is the minimum fusing current related to the current rating of a fuse?
Each fuse has its own rating. It will be marked on the fuse somewhere.
How do breakers work?
Circuit breakers can be of these types Fuse wire that melts when subjected to an over current. Magnetic. These contain a small electromagnet coil which becomes magnetised when a current flows through it. An over current operates a switch off mechanism which cannot be reset until the fault current is removed. Thermal, These contain a bimetallic strip that is heated by the fault current. The strip bends by uneven expansion of the two metals and operates a switch mechanism. Residual Current Device These monitor the current flowing to and from an electrical product. Any difference in current by a fault flowing via the earth protection wire will operated an electronic trip mechanism to isolate the device. Some breakers combine two of the above types eg thermal magnetic
A sentence using the word dilemma?
My current dilemma centers around my 1968 VW and lack of funds to keep it running. There will always be a new dilemma, you must rise above it!
Use a flow chart to show how a coal fired power station generates electricity?
It's kind of hard to show a flow chart in WikiAnswers - but we can list the steps:Air and coal are fed to the furnace/boiler where the coal is burned. If the power station is attempting to be clean, the exhaust from the furnace is filtered and scrubbed to remove particulates and noxious gasses before being released to the atmosphere (from a smokestack).Water is pumped through pipes running through the furnace/boiler where it is turned into superheated steam - steam under pressure at a temperature above the boiling point for the pressure.The superheated steam is fed to a steam turbine where it turns the blades of the turbine, thus turning the shaft they are attached to. The pressure of the steam drops as it passes through the turbine.The steam that has expanded across the turbine is fed to a condenser where it is cooled and condensed before being pumped back to the boiler. Generally this requires a separate water source (from a lake or river) to be used in counter-current flow to cool the steam. The cooling water is then usually cooled by running it through an evaporative cooling tower before returning it to the lake or stream it originally came from - although it may be recycled quite a bit before being returned.The turning shaft attached to the turbine turns an electromagnet within a wire coil field, generating alternating current (the details of how an alternating current generator works are a different question).Most of the current from the generator is fed to the power grid, with some bled off to power the electromagnet of the generator.
What type of nuclear detonation occurs above 100'000 feet and generates a high energy electromagnet pulse?
high-altitude burst
What is 3.6717717717 using raised-bar notation?
It would be 3.67177 except that the horizontal line would be above 7177, not running through those numbers.
What happens to the direction of the magnet field about a straight section of wire when the direction of the current is reversed?
In that case, the magnetic field caused by the current would also be reversed. As for the wire itself, it would feel a force in the opposite direction, due to the interaction of the magnetic fields.
Can a permanent magnet be turned off and on?
Electromagnet. it is a piece of metal (usually iron) that is wrapped in copper wire. it is turned on by putting electricity through the copper wire. it then producces a magnetic field when electricity is run through it.
If you know the current through one resistor in a DC circuit then do you know the current through all the other resistors?
No. Current and voltage are directly proportional to one-another and both are related to resistance by Ohm's law: V = IR or Volts = Current * Resistance So the current will depend upon the voltage and the circuit resistance by rearranging the above equations: I = V/R Meaning that the current will decrease as circuit resistance is increased if the voltage remains constant.
