c An air cored solenoid with length 20 cm area of 17 cross

Last updated: 6/10/2023

c An air cored solenoid with length 20 cm area of 17 cross section 20 cm and number of turns 400 carries a current 2 A The current is suddenly switched off within 10 s The average back emf induced across the ends of the open switch in the circuit is ignore the variation in magnetic field near the ends of the solenoid c 3V d 5V 2V b 4 V