CUET and UG exam CUET UG 2025 Mock Test Series Physics Electromagnetic Induction and Inductance Faraday’s Law of Induction
A long solenoid is formed by winding insulated copper wire at the rate of 20 turns per cm. The current that is necessary to produce a magnetic field of 20 mT inside the solenoid at its centre would be:
1
7.0 A
2
8.0 A
3
9.0 A
4
10.0 A