Q7 An air cored solenoid with length 30 cm area of cross

Last updated: 6/4/2023

Q7 An air cored solenoid with length 30 cm area of cross section 25 cm and number of turns 500 carries a current of 2 5 A The current is suddenly switched off in a brief time of 10 3 s How much is the average back emf induced across the ends of the open switch in the circuit