Question:

A coil is placed perpendicular to a magnetic field of 5000 T. When the field is changed to 3000 T in 2s, an induced emf of 22 V is produced in the coil. If the diameter of the coil is 0.02 m, then the number of turns in the coil is : 

(1) 7 

(2) 70 

(3) 35 

(4) 140                                           JEE-2024         

Solution:                
A coil is placed perpendicular to a magnetic field of 5000 T. When the field is changed to 3000 T in 2s, an induced emf of 22 V is produced in the coil. If the diameter of the coil is 0.02 m, then the number of turns in the coil is : (1) 7 (2) 70 (3) 35 (4) 140 JEE-2024

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