Question

The electric field strength at a distance r from a charge q is E. What will be electric field strength if the distance of the observation point is increased to 2 r?

• A. E/2
• B. E/4
• C. E/6
• D. none of the above

Answer 1

Answer: (B)

E/4

Answer 2

As new distance = 2 r and electric field due to single charge, $E \propto \frac{1}{r^2}$ , therefore, new intensity $= E/4$.