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The voltmeter is an instrument which measures voltages (tensions or differences of potential) between both ends of an element in a circuit through which there is an electric current circulating.
This visual shows you how to insert an ammeter and how to use it in a circuit.
When an electric current of variable intensity circulates through a coil an induced current originates inside it.
A light bulb in a circuit near another circuit with a battery, a coil and a rheostat, can light up even though ITS OWN CIRCUIT HAS NO BATTERY.
The following visual explains the precautions that should be taken into account when dealing with electricity
A hydraulic circuit is a good analogy for understanding what an electric circuit is like.
The transformer modifies the voltage of a current.
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