Question

Can someone help with these?

Answer 1

Answer:

  3.  0.0125 V

  4.  change in time, ∆t

Explanation:

3. Faraday's law says ...

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

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.