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Question: Answered & Verified by Expert
A conducting sphere of radius $R=20 \mathrm{~cm}$ is given a charge $Q=16 \mu \mathrm{C}$. What is $\overrightarrow{\mathbf{E}}$ at centre?
PhysicsElectrostaticsJIPMERJIPMER 2005
Options:
  • A $3.6 \times 10^6 \mathrm{~N} / \mathrm{C}$
  • B $1.8 \times 10^6 \mathrm{~N} / \mathrm{C}$
  • C Zero
  • D $0.9 \times 10^6 \mathrm{~N} / \mathrm{C}$
Solution:
2410 Upvotes Verified Answer
The correct answer is: Zero
The value of $E$ at the centre of sphere is zero. Since, the centre of sphere is placed with in the Gaussian surface. Hence $E=0$.

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