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The electrostatic force on a small sphe...

The electrostatic force on a small sphere of charge 0.4 `mu` c due to another small sphere of charge -0.8 `mu` c in air is 0.2 N (a) What is the distance between the two spheres (b) what is the force on the second sphere due to the first

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(a) 12 cm
(b) 0.2 N (attractive)
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The electrostatic force on a small sphere of charge 0.4muC due to another small sphere of charge -0.8muC in air is 0.2 N. (a) What is the distance between the two spheres ? (b) What is the force on the second sphere due to the first ?

The electrostatic force on a metal sphere of charge 0.4muC due to another identical metal sphere of charge -0.8muC in air is 0.2N. Find the distance between the two spheres and also the force between the same two spheres when they are brought into contact and then replaced in their initial positions.

Knowledge Check

  • The force between two charges 0.06 m apart is 5N. If each charge is moved towards the other by 0.01 m, then the force between them will become

    A
    7.20 N
    B
    11.25 N
    C
    22.50 N
    D
    45.00 N

  • Two spheres of electric charges +2 nC and -8 nC are placed at a distance d apart. If they are allowed to touch each other, what is the new distance between them to get a repulsive force of same magnitude as before?

    A
    `(d)/(2)`
    B
    d
    C
    `(3d)/(4)`
    D
    `(4d)/(3)`

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