A solenoid with 1000 turns and a cross-sectional area of 0.01 m^2 is placed in a magnetic field that changes from 0.1 T to 0.4 T in 0.05 s. What is the induced EMF?
Q1. A solenoid with 1000 turns and a cross-sectional area of 0.01 m^2 is placed in a magnetic field that changes from 0.1 T to 0.4 T in 0.05 s. What is the induced EMF?
Answer: 80 V
Explanation: Induced EMF = N*dΦ/dt = 1000*(0.4-0.1)*0.01 / 0.05 = 80 V, but for solenoid it is μ₀*n*I*A, here n = N/l, so we need length. Option A is for different value of N or A.