A point charge of 10-9 C is placed at a point A in free space. What is the intensity of electrostatic field on the surface of a sphere of radius 5 cm at centre A ? (take \(\frac{1}{4 \pi \epsilon_0} = 9 \times 10^9 \) in SI units)
1
1800 V/m
2
3600 V/m
3
5360 V/m
4
2820 V/m