List of top Physics Questions on Electric Current asked in KEAM

The drift velocity of electrons in a linear conductor of given length under a potential can be doubled by

If the drift velocity of electrons in a copper wire of cross-sectional area $2\,mm^2$ carrying current $I$ is $v_1$ and that in another copper wire of cross-sectional area $1.5\,mm^2$ carrying current $2I$ is $v_2$, then the ratio $v_1 : v_2$ is

Mobility is the drift velocity per unit

The dependence of drift velocity \( v_d \) on the electric field \( E \), for which Ohm's law is obeyed is

If \(\tau\) is the average time between any two successive collisions for the electrons in a metal wire under the application of an electric field E, then the mobility \(\mu\) of the electrons is

A copper wire with a cross-sectional area of $2 \times 10^{-6}$ m$^2$ has a free electron density equal to $5 \times 10^{22}$/cm$^3$. If this wire carries a current of $16$ A, the drift velocity of the electron is}

The amount of charge flowing per second per unit area normal to the flow is called

A flow of \(10^6\) electrons per second in a conducting wire constitutes a flow of current of