[" A potential difference "V" is applied to a "],[" copper wire of length "l" and radius "r" .If "],[" length is doubled,the drift velocity "]

A potential difference V is applied across a coper wire of diameter d and length l. When d is doubled, the drift velocity:-

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.

Let a potential difference V be applied across a cylindrical conductor of length l and radius r. how is the drift velocity of electrons affected if 1. Length 1 of conductor is doubled ? 2. Potential difference V is doubled ? 3. Radius r is doubled ?