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Grade 11Electrostatics

A hollow insulated conduction sphere is given a positive charge of 10 mC. What will be the electric field at the centre of the sphere if its radius is 2 metres?

(a) Zero

(b) 5 uCm-2

(c) 20 uCm-2

(d) 8 uCm-2

Profile image of Simran Bhatia
12 Years agoGrade 11
Answers icon

2 Answers

Profile image of Amit Saxena
12 Years ago

(a)

Charge resides on the outer surface of a conducting hollow sphere of radius R. We consider a spherical surface of radius r < R. By Gauss''s theorem,

 

 

 

 

i.e., electric field inside a hollow sphere is zero.

Profile image of Maham Hanif
6 Years ago
Field inside a conducting sphere is zero.
Formula of gausses law,
Φ=q/∈0
put q=0, final ans will be zero.
Hope it helps!

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