A solenoid has 2000 turns wound over a length of 0 30 m The

Last updated: 6/25/2023

A solenoid has 2000 turns wound over a length of 0 30 m The area of its cross section 1 2 x 10 m Around its central section a coil of 300 turns wound If an initial current of 2 A in the solenoid is reversed in 0 25 s then the emf induced in the coil is equal to 8 6 10 V B 4 8 x 10 2 V Correct Answer 1 2 10 V 2 6 0 10 V EXPLANATION di 140 N N A de dt 4TX10 7x2000 300 1 2 10 4 Emf Mdi dt 0 3 0 25