Two point charges are fixed in air as described below.

PHYSICS · Multi-part · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two point charges are fixed in air as described below. (i) A charge of

+2\,\mu\text{C}

is placed

0.40\,\text{m}

from a charge of

+3\,\mu\text{C}

. Calculate the magnitude of the electrostatic force

F

between them. (ii) Both charges are then changed to

+4\,\mu\text{C}

and

+6\,\text{C}

respectively, while their separation is reduced to

0.20\,\text{m}

. Without using the value of the constant again, determine the new force in terms of

F

and hence find its numerical value.