Answer:
Emf = 0.040 V
Explanation:
From Faraday's law of electromagnetic induction,
Emf induced = -N (dΦ/dt)
Φ = AB; (dΦ/dt) = A (dB/dt)
Emf induced = - NA (dB/dt)
Average emf induced = -NA (ΔB/Δt)
N = number of turns = 1
A = Area of the loop = πr² = π(0.072)² = 0.0163 m²
ΔB = 0.16 - 0.65 = - 0.49 T
Δt = 0.20 s
E = - (1)(0.0163)(-0.49)/(0.2)
E = 0.040 V
