Question

Two metal spheres are suspended from strings. The

charge on sphere (a) is -2.0*10^2 C and the other (b)-4.0
*10^-8 C. Use the diagram to help you find the electric
force acting on the spheres?
3.0 m

A.An attractive force of 24*10^3 N

B. A repulsive force of 8.0*10^3 N.

C.An attractive force of 8.0*10^3 N

D. A repulsive force of 24*10^3N​

Answer 1

B. A repulsive force of 8.0*10^3 N.

Step-by-step explanation:

As we know by Coulomb's law that the electrostatic force between two charges is given as

`F = (kq_1q_2)/(r^2)`

here we know that

`q_1 = -2 * 10^2 C`

`q_2 = -4 * 10^(-8) C`

r = 3.0 m

now we have

`F = ((9 * 10^9)(2 * 10^2)(4* 10^(-8)))/(3^2)`

`F = 8000 N`

since both charges are similar charges so they will repel each other by the force we calculated above so correct answer will be

B. A repulsive force of 8.0*10^3 N.