In a physics laboratory experiment, a coil with 210 turns enclosing an area of 1

Question

In a physics laboratory experiment, a coil with 210 turns enclosing an area of 11.7 cm2 is rotated during the time interval 4.10×10?2 s from a position in which its plane is perpendicular to Earth's magnetic field to one in which its plane is parallel to the field. The magnitude of Earth's magnetic field at the lab location is 5.00×10?5 T .

A) What is the magnitude of the magnetic flux (?initial) through the coil before it is rotated?

B) What is the magnitude of the magnetic flux ?final through the coil after it is rotated?

C) What is the magnitude of the average emf induced in the coil?

Explanation / Answer

A) flux = magnetic field strength * number of turns* area

= 5 * 10^(-5) * 210 * 11.7 * 10^(-4)

= 1.2285*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

= (1.2285*10^-5) / (4.10 * 10^-2)

= 2.996*10^-4 V

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