Question

Electric current is defined as rate of flow of charge if charge flowing through a wire at time t is given as Q=t^2-2t+1, then current through wire is zero at time?

Answer 1

Electric Current

The rate of flow of charge through a cross section of some region of a metallic wire (or an electrolyte) is called the current through that region.

If rate of flow of charge is not constant then the current at any instant is given by the differential limit: I = dQ/dt.

If a charge Q flows through the circuit for time t, then

 I = Q/t.

The S.I unit of current is called ampere (A) (coulomb/second).

1 ampere = 6.25 × 108 electrons/ sec