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Question
A break in the filament of an electric bulb means________.
Options:
A .  the switch is off
B .  the switch is on 
C .  the circuit is complete
D .  the circuit is incomplete
Answer: Option D
:
D
A bulb with broken filament is called a fused bulb andit does not glow. If the filament of abulb is broken,the circuit is incomplete. Thus, itrestricts the flow of current.

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