Question

A hollow metal ball 10 cm in diameter is given a charge of 1 × 10^-2 C. What is the magnitude of the electric field intensity at a point 20 cm from the centre of the ball ?

Answer 1

Data : D = 10 cm, 

R = D/2 = 5 cm, 

q = 1 × 10 C,= 5 cm, 

q = 1 × 10^-2 C,

r = 20 cm = 0.2 m, 

ε₀ = 8.85 × 10^-12 Electric field intensity,