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also wat r transformers?

2006-06-16 12:06:27 · 12 answers · asked by Crazzzzzy 2 in Science & Mathematics Physics

12 answers

Electric current is the rate of charge flow past a given point in an electric circuit, measured in coulombs/second which is named amperes.

A transformer is an electrical device that transfers energy from one circuit to another by magnetic coupling with no moving parts. A transformer comprises two or more coupled windings, or a single tapped winding and, in most cases, a magnetic core to concentrate magnetic flux. Transformers are used to convert between high and low voltages, to change impedance, and to provide electrical isolation between circuits.

2006-06-16 12:11:13 · answer #1 · answered by Vivek 4 · 0 0

Current is what is flowing when a circuit is in use,ie when you
switch a kettle on and is measured in amps.The voltage is the
potential across the circuit and the power in watts is amps
multiplied by volts.Charge is when you revitalise a flat battery
byputting the current back in that has been discharged and also bring up the voltage to normal.Transformers are used to step up
or step down the voltage or match line and equipment ie impedance to give maximum power transfer. Transformers are made from coils of wire and can also block direct current from a
battery but let through alternating current ie mains.

2006-06-18 15:48:39 · answer #2 · answered by marshman 2 · 0 0

A transformer is a device used to transfer electric energy from one circuit to another, especially a pair of multiply wound, inductively coupled wire coils that effect such a transfer with a change in voltage, current, phase, or other electric characteristic. A charge is related to the polar opposites of positive (+) and negative (-) which can be used to control the behavior of electricity.

2006-06-16 19:11:25 · answer #3 · answered by Brandy C 1 · 0 0

Current (I) - Formula: I = V/R. Depends on the amount of electrons flowing through a wire.

Charge (Q) - Formula: Q = It. Refers to the current (electrons) flowing through a point in a certain amount of time.

Transformers increases or decreases the voltage of the source current by changing the number coils on the iron armature.

2006-06-17 08:37:13 · answer #4 · answered by Kemmy 6 · 0 0

imagine this:
you're at a supermarket, and you've bought 20 cans of baked beans. each can contains, let's say, 200 beans. each can represents the charge. the current is the conveyor that you put them on that leads to the checkout. this moves at a certain speed, and moves the charge from a to b.
a transformer moves voltage from one type of circuit to another, or "transforms" voltage from one level to another (i.e, 240v to 12v). it doesn't convert ac to dc, you have to do this using a rectifier and a bridge of diodes. but that's the general idea of it.

2006-06-17 08:36:51 · answer #5 · answered by dan 1 · 0 0

Transformers are robots in disguise.Optimus Prime was the leader of the good guys and they were massive in the eighties.
Some of the robots were disguised as cars, vans, ambulances, helicopters and motorbikes. They had little human friends too.

hope this helps-0

2006-06-17 06:52:04 · answer #6 · answered by willows 5 · 0 0

Charge is a bucket load of water

Current is how fast it flows when you pour it out of the bucket.

To understand transformers you have to ask a question about volts first!

2006-06-16 19:10:03 · answer #7 · answered by wild_eep 6 · 0 0

Current is the measurement of charge moving thu a wire

2006-06-16 19:31:02 · answer #8 · answered by stillhappy89 4 · 0 0

Current is when your electricity is flowing in nicely; charge is when your money runs out to pay for it.

2006-06-18 13:10:24 · answer #9 · answered by ivallrod 4 · 0 0

Hint: current is the net movement of charge.

2006-06-16 22:20:35 · answer #10 · answered by Anonymous · 0 0

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