Sun February 10, 2013 By: Renu Mariam John

A copper voltmeter and a bulb of rating 100 W-220V are connected in series across a dc source.if 0.198g of copper is deposited on the electrode in 40 minutes,calculate potential difference across the bulb assuming that its resistance is constant.ECE of calcium=0.00033g/c.

Expert Reply
Mon February 11, 2013
Putting the values find out i.
then that would be the current in bulb as well as the voltmeter as they are connected in series.
Now find resistance of bulb from formula :P=V2/R,putting P=100W and V=220V
then the voltage across bulb=iR
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