The electric potential $V(x)$ in a region around the origin is given by $V(x)=4 x^2$ volts. The electric…
The electric potential $V(x)$ in a region around the origin is given by $V(x)=4 x^2$ volts. The electric charge enclosed in a cube of $1 \mathrm{~m}$ side with its centre at the origin is (in coulomb)
$8 \varepsilon_0$
$-4 \varepsilon_0$
0
$-8 \varepsilon_0$
Solution
Charges reside only on the outer surface of a conductor with cavity.