# A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity will a) Be doubled b) Be halved c) Be quadrupled d) Remain unchanged

## Question ID - 150308 :- A potential difference is applied across the ends of a metallic wire. If the potential difference is doubled, the drift velocity will a) Be doubled b) Be halved c) Be quadrupled d) Remain unchanged

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 (a) Drift velocity is defined as the average velocity with which free electrons get defined towards the positive end of the conductor under the influence of an external electric field. Drift velocity is given by  (if is length of the conductor and V is constant potential difference applied across the ends of the conductor) So, when the potential difference is doubled the drift velocity will be doubled.
 A silver voltameter of resistance and a resistor are connected in series across a cell. If a resistance of is connected in parallel with the voltameter, then the rate of deposition of silver a) Decreases by 25% b) Increases by 25% c) Increases by 37.5% d) Decreases by 37.5% 