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what is the force between two small charged spheres having charges of 2×10^-7 and 3×10^-7 placed 30cm in air? |
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Answer» tion:Charge on the first sphere, q 1 =2×10 −7 CCharge on the SECOND sphere, q 2 =3×10 −7 CDISTANCE between the spheres, R=30cm=0.3mF= 4πε 0 r 2 q 1 q 2 Where, ε 0 = Permittivity of free space4πε 0 1 =9×10 9 Nm 2 C −2 F= (0.3) 2 9×10 9 ×2×10 −7 ×3×10 −7 =6×10 −3 NHence, 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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