A conducting loop in the form of a circle is placed perpendicular to a magnetic field of 0.50 T. If the area of the loop decreases at a rate of 3.0 × 10^-3 m²/s, what is the induced emf in the loop? A) 1.7 mV B) 4.3 mV C) 5.5 mV D) 0 mV E) 1.5 mV

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Quizplus · Accepted Answer

The induced emf (ε) is given by Faraday's law: ε = -dΦ/dt, where Φ is the magnetic flux. Since Φ = B * A and B is constant, ε = -B * dA/dt. Substituting B = 0.50 T and dA/dt = 3.0 × 10^-3 m²/s, we get ε = 0.50 * 3.0 × 10^-3 = 1.5 mV.

A Conducting Loop in the Form of a Circle Is