JEE Main 2024 Physics question
The magnetic flux φ (in weber) linked with a closed circuit of resistance 8 Ω varies with time (in seconds) as φ = 5t² – 36t + 1. The induced current in the circuit at t = 2 s is A.
Answer: 2
Solution
|ε| = |dφ/dt| = |10t − 36| = |20 − 36| = 16 V at t = 2 s. So i = 16/8 = 2 A.