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Question

Resistance of a voltameter is 2, it is connected in series to a battery of 10 V through a resistance of 3 . In a certain time mass deposited on cathode is 1 gm. Now the voltameter and the 3resistance are connected in parallel with the battery. Increase in the deposited mass on cathode in the same time will be

A

0

B

1.5 gm

C

2.5 gm

D

2 gm

Medium

Solution

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Correct option is
B

1.5 gm

Remember mass of the metal deposited on cathode depends on the current through the voltameter and not on the current supplied by the battery. Hence by using , we can say  

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