In a physics laboratory experiment, a coil with 220 turns enclosing an area of 1

Question

In a physics laboratory experiment, a coil with 220 turns enclosing an area of 10.8 cm2 is rotated in a time interval of 4.50×102 s from a position where its plane is perpendicular to the earth's magnetic field to one where its plane is parallel to the field. The earth's magnetic field at the lab location is 6.7×105 T .

Part A

What is the total magnetic flux through the coil before it is rotated?

Express your answer using two significant figures, units Wb

Part B

What is the total magnetic flux through the coil after it is rotated?

Express your answer using two significant figures, units Wb

Part C

What is the average emf induced in the coil?

Express your answer using two significant figures, Unit V

Explanation / Answer

A) flux = magnetic field strength * number of turns* area
= 6.7 * 10^(-5) * 220 * 10.8 * 10^(-4) = 1.6 x 10-5 Wb

B) Final flux is zero since the coil has its plane parallel to the field
C)emf induced = change in flux/ time taken = 16 x 10-6 / 4.50×102 s = 3.5 x 10-4 V

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