Question

Two point charges 2 uC and 8 uC are placed 12 cm apart. Find the position of the point where
the electric field intensity will be zero.​

Answer 1

Answer:

The position of point from 2C charge, where the electric field intensity is zero is:a)4 cmb)12 cmc)2 cmd)8 cmCorrect answer is option 'A'.

Answer 2

Let that distance be x cm

at distance x from the smaller charge, forces from both the charges are equal. Thus,

x

2

k(2μC)

=

(15−x)

2

k(8μC)

⟹(15−x)

2

=4x

2

⟹x

2

+10x−75=0

solving quadratic equation, we get

x=5,−15