A potential difference of `V` applied at the ends of a copper wire of length `l` and diameter `d`. On doubling only `d` drift velocity.

A constant potential difference is applied between the ends of the wire . If the length of the wire is elongated 4 times , then the drift velocity of electrons will be

A constant potential difference is applied between the ends of the wire. If the length of the wire is elongated 4 times, then the drift velocity of electrons will be

A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity will

When a potential difference of 2 V is applied across the ends of a wire of 5 m length, a current of 1 A is found to flow through it. Calculate (i) the resistance per unit length of the wire, (ii) the resistance of 2 m length of the wire. (iii) the resistance across the ends of the wire if it doubled on itself.