1.

The capacitance of a spherical condenser is \[1\mu F\]. If the spacing between the two spheres is\[1\,mm\], then the radius of the outer sphere is  [CPMT 1989]

A. \[30cm\]
B. \[6m\]
C. \[\text{1}.\text{5}\times \text{1}{{0}^{\text{3}}}N\] (repulsive)
D. \[3m\]
Answer» E.


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