The bulb in an electric circuit will not glow if

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Connections are loose

Switch is open

Bulb is fused

All of these

answer is D.

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Detailed Solution

[12][13]
The bulb in an electric circuit will not glow if connections are loose, the switch is open, and the bulb is fused.
An electric circuit is said to be in an open state if there is a breakage in the circuit. The bulb in an electric circuit will not glow if the bulb itself is a fuse or if the switch is in the open position, and or if any connection in the circuit is loosely made.

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