A) Greater when switched off
B) Smaller when switched on
C) Greater when switched on
D) The same whether it is switched off or switched on
Correct Answer: C
Solution :
\[R\propto \frac{1}{\tau };\] where \[\tau \]= Relaxation time. When lamp is switched on, temperature of filament increase, hence \[\tau \]decrease so R increasesYou need to login to perform this action.
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