A) \[\frac{\rho }{4\pi }\left( \frac{1}{a}-\frac{1}{b} \right)\]
B) \[\frac{\rho }{2\pi }\left( \frac{1}{a}-\frac{1}{b} \right)\]
C) \[\frac{\rho }{2\pi }\left( \frac{1}{a}+\frac{1}{b} \right)\]
D) \[\frac{\rho }{4\pi }\left( \frac{1}{a}+\frac{1}{b} \right)\]
Correct Answer: A
Solution :
[a] |
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