The number of electrons to be put on a spherical conductor of radius 0.1 m to produce an electric field of 0.036 N/C just above its surface is

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2.7×105

2.6×105

2.5×105

2.4×105

answer is C.

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Detailed Solution

E=14πε0·ner2⇒n=Er2e.4πε0 ⇒n=0.036×0.1×0.19×109×1.6×10-19=360144×105 =2.5×105

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