10. The polential greadiant at a point due to a 2 nc Charge is -2 N/c calculate the distance of the point from the Charge?
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For point charge
E=V/r
Given
V=15J/C
E=30N/C
Distance from point charge, r=?
Point charge, q=?
r=V/E=15/30=0.5m
V=
4πε
0
r
q
q=4πε
0
rV
q=
9×10
9
1
×0.5×15
q=0.83×10
−9
C
q=0.83nC
Explanation:
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