An AM radio detects the oscillating magnetic field of the radio wave with an ant

Question

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 1) .Ferrite is a magnetic material that “amplifies” the magnetic field of the wave. The radio antenna broadcasts waves with the electric field vertical, the magnetic field horizontal.

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If a radio antenna is located due north of you, how must the ferrite bar be oriented for best reception? Select the correct answer and explanation.

Options are:

a.

The coil and ferrite bar need to be horizontal since the magnetic field will be oscillating in a horizontal plane (perpendicular to the vertical plane of the electric field). If the station is north of you, then the magnetic field will oscillate in an east-west direction, and that is the way you should orient your ferrite bar to detect the largest changes in flux. b. The coil and ferrite bar need to be vertical since the magnetic field will be oscillating in a horizontal plane (perpendicular to the horizontal plane of the electric field). If the station is north of you, then the magnetic field will oscillate in an east-west direction, and you should orient your ferrite bar in a north-south direction to detect the largest changes in flux. c. The coil and ferrite bar need to be horizontal since the magnetic field will be oscillating in a horizontal plane (perpendicular to the vertical plane of the electric field). If the station is north of you, then the magnetic field will oscillate in an east-west direction, and you should orient your ferrite bar in a north-south direction to detect the largest changes in flux. d. The coil and ferrite bar need to be vertical since the magnetic field will be oscillating in a horizontal plane (perpendicular to the horizontal plane of the electric field), and you should orient your ferrite bar vertically irrespective of the location of the station to detect the largest changes in flux.

Explanation / Answer

to indcued the larger emf, a large amount of field mudt acts on it hence i here the

The coil and ferrite bar need to be horizontal since the magnetic field will be oscillating in a horizontal plane (perpendicular to the vertical plane of the electric field).

If the station is north of you,

then the magnetic field will oscillate in an east-west direction,

and that is the way you should orient your ferrite bar to detect the largest changes in flux.

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