Question

What is an electric current ? Distinguish between an open and a closed circuit.

Answer 1

An electric current is a flow of electric charge the difference between open and closed circuit are as follows - a. in open circuit current does not flow but in closed circuit it flows .

Answer 2

Electric current is a flow of electric charges I a conductor such as metal wire. it is measured in amperes.

current ( I ) = Charge ( Q ) / Time ( T )

I = Q / T

Ammeter is an instrument which is used to measure the electric current..

» In an open circuit the current cannot flow, whereas , In an closed circuit current can flow.

» In an electric circuit , when the key switch is " off "then it is closed circuit. on the other hand, In an electric circuit , when the key switch is " on " Then , it is called open circuit.

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