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5/31 MCQs for:
Electromagnetism
A pure inductor is connected to an AC power supply. In this circuit, the current:
A wire moves across a magnetic field. The emf produced in the wire depends on:
The power factor of an RLC circuit is defined as cos? = R/Z, but the phase angle can also be calculated from :

A circular loop of radius 0.10 m is rotating in a uniform magnetic field of 0.20 T. Find the magnetic flux through the loop when the plane of the loop and the magnetic field vector are at an angle of 300.

The cross-sectional area of an adjustable single loop is reduced from 1.0 m2 to 0.50 m2 in 0.10 s. What is the average emf that is induced in this coil if it is in a region where B = 2.0 T upward, and the coil's plane is perpendicular to B?