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Questions  >>  JEEMAIN and NEET  >>  Physics  >>  Class12  >>  Current Electricity
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The resistance of hot tungsten filament is about 10 times the cold resistance. What will be the resistance of 100W and 200V lamp when not in use?

$\begin {array} {1 1} (A)\;40\Omega & \quad (B)\;20\Omega \\ (C)\;400\Omega & \quad (D)\;200\Omega \end {array}$

 

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