Do the forces from the previous problem repel or attract For

Do the forces from the previous problem repel or attract? For problem, \"Find the force of repulsion/attraction between a charge and a 5 mu C charge when they are 60 mm apart.\"

Solution

Here let first charge is p, so clearly required force

F=q1q2k/r^2 =(9 x 10^9 N-m^2/C^2) (5 x 10^-6C)p/(60 x 10^(-3))^2

= ( 9 x 5 x p x 10^3/ 36 x 10^(-2)

= 4500000p/36 = 125000p newton

that is required force where p is the first charge in microC that is not given here.

And if p is positive that there will be repulsion and if it is negative, there will be attraction.

Answer