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Question

The dielectric strength in air is 3×106Vm1. Charge to be given to a conducting sphere of radius 2m is :


  1. 1.33×103C
  2. 2.66×103C
  3. 3×103C
  4. infinite

A
3×103C
B
2.66×103C
C
infinite
D
1.33×103C
Solution
Verified by Toppr

Considering that the charge is Q. The dielectric strength of air is given. The maximum charge which can be given without ionising the air around it is given by,
E=kQ/r2
3×106=9×109×Q/4
Q=1.33×103C

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