Question -
Answer -
(a) Electrostaticforce on the first sphere, F = 0.2 N
Charge on this sphere, q1 =0.4 μC = 0.4 × 10−6 C
Charge on the secondsphere, q2 = − 0.8 μC = − 0.8 × 10−6 C
Electrostatic force between thespheres is given by the relation,
Where, ∈0 =Permittivity of free space
The distance between the twospheres is 0.12 m.
(b) Both thespheres attract each other with the same force. Therefore, the force on thesecond sphere due to the first is 0.2 N.