Question

2. Electric field intensity is 400V/m at a distance 2m from a point charge. It will be 100V/m at a distance?
a) 50cm
b) 4cm
c) 4m
d) 1.5m​

Answer 1

Answer:

The distance will be 8 m

Explanation:

E = 400 V/m

d = 2m

V = E x d

where :

1. E is electric field
2. V is voltage
3. d is distance

V = 400 x 2 = 800 V

Voltage remains constant. When :

E = 100 V/m

d = ?

d = V /E

  = 800 /100 = 8 m