| ASSERTION: When current through a bulb decreases by 0.5% the glow of bulb decreases by 1 %. |
| REASON: Glow (power) which is directly proportional to square of current. |
A) If both assertion and reason are true and reason is the correct explanation of assertion.
B) If both assertion and reason are true and reason is not the correct explanation of assertion.
C) If assertion is true but reason is false.
D) If both assertion and reason are false.
E) If assertion is false but reason is true.
Correct Answer: A
Solution :
Glow = Power \[\left( P \right)={{I}^{2}}R\] \[\therefore \,\,\,\frac{dP}{P}=2\left( \frac{dt}{I} \right)=2\times 0.5=1%\].
You need to login to perform this action.
You will be redirected in
3 sec
