Question

Why do we use U shaped magnet in making an electric bell

Answer 1

shape creates a strong magneticfield between the poles. It is one type of permanent magnet, meaning that itstays magnetized, as opposed to an electromagnet, the magnetic field of which can be started and stopped. The purpose of a horseshoe magnet's shape is to place the poles as close together as possible.

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Answer 2

A shape creates a strong Magetic field b\w the poles .its one type of permanent magnet