JEE Main 2024 (31 Jan, Shift 1) Physics Q43: Faraday's Law

Question

A coil is places perpendicular to a magnetic field of 5000 T. When the field is changed to 3000 T in 2 s, 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) $140$
(3) $35$
(4) $70$ Official answer

Official answer

Option 4

NTA final key.

Accepted Answer

Option 4: $70$

Answer

$7$

Answer

$140$

Answer

$35$

Answer

$70$

JEE Main 31 January 2024, Shift 1, Physics Q43

Same idea in other shifts