Question

7. Assuming the earth to be a spherical conductor of diameter 1.28 x 10 km, calculate
250 V

the stored energy?
Ans. 9 x 10​

Answer 1

Explanation:

If the capacitor of a spherical conductor =1pF

$\frac{1 - 10^{ - 12} }{2\pi _{0} } = 1.8 \times {10}^{ - 5}$