An AM radio detects the oscillating magnetic field of the
Chapter 25, Problem 22CQ(choose chapter or problem)
Problem 22CQ
An AM radio detects the oscillating magnetic field of the radio wave with an antenna consisting of a coil of wire wrapped around a ferrite bar, as shown in Figure. Ferrite is a magnetic material that “amplifies” the magnetic field of the wave.
a. Explain how the radio antenna detects the magnetic field of the radio wave.
b. If a radio station is located due north of you, how must the ferrite bar be oriented for best reception? Assume that the station broadcasts with a vertical antenna like the one shown in Figure.
FIGURE
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