engineering recuitment NMDC Junior Officer (Trainee) Mock Test 2024 Electromagnetic Theory Magnetostatics
An air-cored solenoid of length 50 cm and area of cross section 28 cm2 has 200 Turns and carries a current of 5 A. The current decreases to zero within a time interval of 1 m-sec, when the current is switched OFF. Determine the average emf induced across the ends of the open switch in the circuit.
1
2.4 V
2
1.4 V
3
5.2 V
4
4.6 V