Does a conductor become charged when a current is passed through it?

When no current is passed through a conductor,

A : For a given conductor , electric current does not vary even if its cross sectional area varies . R : A conductor remains unchanged when current flows through it .

A tangent galvanometer shows no deflection when a current is passed through it. But when the current is reversed, it gives a delfection of 180°, then the plane of the coil should have been oriented:.

(A) : Free electrons always keep on moving in a conductor even then no magnetic force act on them in magnetic field unless a current is passed through it. (R) : The average velocity of free electron in a conductor is zero in the absence of the electric field in it.

When a charged comb is brought near a small piece of paper, it attracts the piece. Does the paper, it attracts the piece. Does the paper become charged when the conb is brought near it ?

Find current which is passing through battery.

n electrons flow through a cross section of a conductor in time t. If charge on an electron is e, then write an expression for the current in the conductor.

An automatic electrical switch that breaks the circuit when excess current passes through it

A circular conducting loop of radius R carries a current I . Another straight infinite conductor carrying current I passes through the diameter of this loop as shown in the figure. The magnitude of force exerted by the straight conductor on the loop is

If the potential difference across the ends of a conductor is doubled, the current flowing through it gets