A 25 watt, 220 volt bulb and a 100 watt, 220 volt bulb are connected in series across 440 volt line
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a
only 100 watt bulb will fuse
b
only 25 watt bulb will fuse
c
none of the bulb will fuse
d
both bulbs will fuse
answer is B.
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Detailed Solution
R=V2P;V=iR their resistances are in the ration 4:1 and in series the potential is directly proportional to resistance so potential of 25 W will be more than 220 V so it will fuse.