A) Create 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 :
[c] \[R\propto \frac{1}{\tau };\,where\,\tau =\operatorname{Re}laxation\,\,time\] When lamp is switched on, temperature of filament increases, hence \[\tau \] decreases so R increases
You need to login to perform this action.
You will be redirected in
3 sec
