Charge needed within a unit sphere centred at the origin for producing a potential field,

1. 

Charge needed within a unit sphere centred at the origin for producing a potential field,197-252-1
[A]. 12 pc
[B]. 60 pc
[C]. 120 pc
[D]. 180 pc

Answer: Option C

Explanation:

216-252-1

1-sym-impq = 120p coulomb, r = 1 meter.

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