Home Physics Heating and Chemical Effect of Current Heating Effect of Current What will happen when a 40 watt, 220 volt la…
Physics Heating and Chemical Effect of Current Heating Effect of Current MCQ (Single Correct)

What will happen when a 40 watt, 220 volt lamp and 100 watt, 220 volt lamp are connected in series across 40 volt supply

A
100 watt lamp will fuse
B
40 watt lamp will fuse
C
Both lamps will fuse
D
Neither lamp will fuse

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Verified by Experts
The correct answer is:
D

Bulb (I): Rated current

Resistance

Bulb (II): Rated current

Resistance

When both are connected in series across 40 V supply

Total current through supply

This current is less than the rated current of each bulb. So neither bulb will fuse.

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