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Magnetic Field Due to a Straight Long Wire

The resistanc...

Question

The resistance of hot tungsten filament is about 10 times to that of cold tungsten filament. What will be the resistance of 100 W and 220 V lamp when not in use?

4840 ohm

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4.84 ohm

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484 ohm

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48.4 ohm

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Solution

The correct option is D
48.4 ohm

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