Question

what is the force between two small charged spheres having charges of 2×10^-7 and 3×10^-7 placed 30cm in air?​

Answer 1

Answer:

Therefore, the force between two small charged spheres having charges of 2×10−7C and 3×10−7C placed 30cm apart in the air is 5.994×10−3N.

Explanation:

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Answer 2

Explanation:

Charge on the first sphere, q1=2×10−7 C

Charge on the second sphere, q2=3×10−7 C

Distance between the spheres, r=30cm=0.3m

F=4πε0r2q1q2

Where, ε0= Permittivity of free space

4πε01=9×109Nm2C−2

F=(0.3)29×109×2×10−7×3×10−7=6×10−3N

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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