Question

A conducting sphere of radius $R=20\, cm$ is given a charge $Q=16 \,\mu C$. What is $\vec{ E }$ at centre?

• A. $3.6 \times 10^{6}\, N / C$
• B. $1.8 \times 10^{6} \,N / C$
• C. zero
• D. $0.9 \times 10^{6} \,N / C$

Answer 1

Answer: (C)

zero

Answer 2

The value of $E$ at the centre of sphere is zero.
Since, the centre of sphere is placed with in the Gaussian surface. Hence $E=0$