13. The force between two point charges in air is100 N. If the distance between them is increasedby 50%, then the force between two charges willbe nearly equal to(1) 50 N(3) 100 N(2) 56 N(4) 44 N

Q. under mutual gravitational and electric force then calculate the order of $\frac{Q}{M}$ in SI units.
The force between two point charges is 100 N in air. Calculate the force if the distance between them is increased by 50%.

Q. If the distance between two point charges is increased by $3$, then calculate the decrease in the force between them.

Q. Two like charges are placed a certain distance apart in air. If a brass plate is introduced between them, the force between the two charges will

Q. If the charge on two-point charged bodies and the medium surrounding them are kept unchanged and the distance between them is reduced by $50$% then the force between them _____.