Resistance of a voltameter is 2Ω, it is connected in series to a battery of 10 V through a resistance of 3Ω . In a certain time mass deposited on cathode is 1 gm. Now the voltameter and the 3Ωresistance are connected in parallel with the battery. Increase in the deposited mass on cathode in the same time will be
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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 m=Zit, we can say mSeriesmParallel=iSeriesiParallel⇒mparallel=25×1=2.5gm.