Question Detail

PHY 102 Last Minute Prep Objective Question

Question

Magnetic flux through a loop increases as Φ_B = 6.0t² + 7.0t (mWb). Magnitude of induced emf at t = 2.0s is?
Options
A 3.1 mV
B 31 mV
Correct Answer
C 3.1 mV
D 31 mV
Correct Answer

Option B is the correct answer.

Detailed Explanation

ε = |dΦ/dt| = |12t + 7| at t=2s: ε = |24 + 7| = 31 mV.

Hint

Induced emf = -dΦ/dt.

Question Info