Can someone help with these?

Question

asked Oct 14, 2020 83.7k views

1 Answer

StasGrin · Answer 1 · 2020-10-20T15:58:48+0000

3. 0.0125 V

4. change in time, ∆t

3. Faraday's law says ...

$(\Delta\Phi_B)/(\Delta t) \ \text{(through a fixed area) = induced emf}$

With suitable units, the magnetic flux Φ is the product of the magnetic field strength and the area of the loop. So ...

EMF = (∆B/∆t)·A = (0.250 T/s)·(0.05 m²) = 0.0125 V

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4. Refer to the discussion for problem 3. EMF is proportional to the change of flux with respect to time.