A) Increases by 4%
B) Increases by 2%
C) Decreases by 2%
D) Decreases by 4%
Correct Answer: D
Solution :
\[I\propto \frac{1}{{{r}^{2}}}\] Þ \[\frac{\Delta I}{I}=-2\frac{\Delta r}{r}\]=\[-\,2\times 2=-\,4\,%\] Hence intensity is decreased by 4%.
You need to login to perform this action.
You will be redirected in
3 sec
