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

Material that is widely used to make wire bound standard resistors is

Find current, i.

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

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