Question

Older televisions used a loop antenna like the one in FIGURE$\mathrm{Q}31.9$.How does this antenna Work?

Short answer

An electromagnetic wave passes through a loop antenna, the current produced by magnetic induction in Faraday's law is used.

Step-by-step solution

Figure for old television with loop antenna

Figure of an ancient television with a loop antenna,

Explanation

When an RF current carrying coil is turned into a loop, it can be used as an antenna, known as a loop antenna.

The currents that pass through this loop antenna will be phased.

The magnetic field will be perpendicular to the whole current-carrying loop.

Application:

Electrically tiny loop and coil antennas have traditionally been used as antennas in medium- and long-wave broadcast radio receivers.

A single-turn loop antenna is frequently used to receive UHF channels. Because "rabbit ears" antennas only cover the VHF bands.

They are sometimes used in conjunction with a UHF loop put on the same base to cover all TV channels.