Question

two equal charges each of 1 coulomb are separated by a distance of 1 cm calculate the mass of the body show that the force between the charges equal to the weight of the body​

Answer 1

Charges 'q' each, AB=1 m

wt, of 50kg person

=50×g=50×9.8=490N

The electrostatic force is given as:

F

C

=

r

2

kq

1

q

2

∴

r

2

kq

2

=490N

⇒q

2

=

9×10

9

490×r

2

=

9×10

9

490×1×1

⇒q=

54.5×10

−9

=23.323×10

−5

C≈2.3×10

−4

coulomb.