What is the rate of flow of electric charge through any cross-section of a conductor called?
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Electric current
NCERT (2026-27):
Electric Current – “Currents are not always steady and hence more generally, we define the current as follows. Let ΔQ be the net charge flowing across a cross-section of a conductor during the time interval Δt [i.e., between times t and (t + Δt)]. Then, the current at time t across the cross-section of the conductor is defined as the value of the ratio of ΔQ to Δt in the limit of Δt tending to zero,
\( \displaystyle I(t)\equiv\lim_{\Delta t\to0}\frac{\Delta Q}{\Delta t} \qquad (3.2) \)”