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Electrification

Ques. A spher...

Question

Ques. A sphere shaped metallic body of radius 5cm gained 15×10^6 C electrons. Find the surface charge density of the sphere.

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Solution

We know, 1e = 1.60217646×10^-19C 15×10^6 e= 1.60217646 ×10^-19 × 15×10^6 = 24.03 × 10^-13 C. Area of sphere = 4πr^2 = 4×π×0.05×0.05 = 0.0314 sq.m Surface charge density = Q/A = (24.03×10^-13)/0.0314 = 765.28 × 10^-13 C/sq.m

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