A Solid sphare of radius R has a charge Q distributed in its Volu… - Vidyadip

MCQ

A Solid sphare of radius $R$ has a charge $Q$ distributed in its Volume with a charge density $P=K r^a$ Where $K$ and a are constants and $r$ is the distance from its centre from its centre. if the electric filed at $r=\frac{R}{2}$ is $\frac{1}{8}$ times that at $r=R$, the value of $a$ is.

A
$3$
B
$5$
✓
$2$
D
$7$

✓

Answer

Correct option: C.

$2$

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