What is the force between two small charged spheres having
charges of 2 x 10^-7c and 3 x 10^-7c
placed 30 cm apart in air?
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Explanation:
F= q 1 q 2
_______
4πε 0 r ^2
Where, ε0 = Permittivity of free space
1
____ =9×10 ^9 Nm 2 C ^ −2
4πε0
F= 9×10 ^9 ×2×10 ^ −7 ×3×10 ^ −7
_____________________. =6×10 ^ −3 N
(0.3) ^2
Hence, force between the two small charged spheres is 6×10 ^ −3
N. The charges are of same nature. Hence, force between them will be repulsive.
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