Question

Two fixed point changes + +4e and +e units are
separated by a distance, where should a third point charge q be placed on
line
joining two
Charges,so that it be is
equilibrium. Also calculate
magnitude of q​

Answer 1

Answer:

The third charge q is in equilibrium only when

force on it due to +4e= force due to +e

i.e

x

2

k(4e)q

=

(a−x)

2

k(e)q

or 4(a−x)

2

=x

2

or 2(a−x)=x

or 2a−2x=x⇒x=

3

2a