A solenoid with 100 turns is placed in a region where the magnetic field is perpendicular to its axis. The area of the solenoid is 10 cm^2. If the magnetic field increases from 0 to 2 T in 0.1 s, what is the induced emf in the solenoid?
Q1. A solenoid with 100 turns is placed in a region where the magnetic field is perpendicular to its axis. The area of the solenoid is 10 cm^2. If the magnetic field increases from 0 to 2 T in 0.1 s, what is the induced emf in the solenoid?
Answer: 0.8 V
Explanation: Using Faraday's law, the induced emf is given by the rate of change of magnetic flux, which is proportional to the rate of change of magnetic field. The correct calculation is ΔΦ = N * ΔB * A, where ΔΦ is the change in magnetic flux, N is the number of turns, ΔB is the change in magnetic field, and A is the area. This results in an induced emf of 0.8 V.