railway RRB Technician Grade 1 Mock Test 2024 Physics Electric Fields and Gauss' Law Continuous Charge Distribution
A conducting sphere is charged. If the electric field at a distance 20 cm from the centre of the sphere is 1.2 × 103 NC-1 and points radially inwards, the net charge on the sphere is:
1
4.5 × 109 C
2
-4.5 × 10-9 C
3
1.7 × 109 C
4
-5.3 ×10-9 C