`ABC` is a right - angled triangle, where `AB and BC` are `25 cm and 60 cm`, respectively. A metal sphere of `2 cm` radius charged to a potential of `9 xx 10^5 V` is placed at `B` as in (Fig. 3.133). Find the amount of work done in carrying a positive charge of 1 coulomb from C to A.
.

Options

A. 21 k J
B. 42 k J
C. 14 k J
D. 52 k J

Answer

b

Explanation

Find the potential at `A and C` due to charge at `B`, then the required work done is `W = q(V_A - V_c)`.