During a demonstration in our classroom, I hold a big magnet right under the big

Question

During a demonstration in our classroom, I hold a big magnet right under the big table pointing north pole up. When I lower the magnet the magnetic field strength decreases from a value of 0.728 T to 0.150 T uniformly in 0.238 s. If a metal loop with an area of 0.450 m2  is laying flat on the table during the demonstration, what is the induced emf in the loop? zero 0.26 V 1.1 V 1.7 V 2.4 V During a demonstration in our classroom, I hold a big magnet right under the big table pointing north pole up. When I lower the magnet the magnetic field strength decreases from a value of 0.728 T to 0.150 T uniformly in 0.238 s. If a metal loop with an area of 0.450 m2  is laying flat on the table during the demonstration, what is the induced emf in the loop? zero 0.26 V 1.1 V 1.7 V 2.4 V

Explanation / Answer

e = (B2-B1)*A/t = ((0.728-0.15)*0.45)/(0.238) = 1.1 V

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