Question

The area of a 120 turn coil oriented with its plane perpendicular to a 0.17T magnetic field is 4.8

Answer #1

NSB (N the number of turns, S area of a turn and B the magnetic
field. if the magnetic field reverses its direction the magnetic
flux changes its sign but not its magnitude becoming -NSB. the
change in magnetic flux is

NBS-(-NBS)=2NBS

the induced emf is by definition (in magnitude)

induced emf=change of the magnetic flux/time in which the change is
achieved and so

emf=2NBS/t=2x120x0.17x0.048/0.29 Volt =6.75 V

the rest should be your contribution using the computer!

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