Describe the working of a loudspeaker using the principles of magnetism and electricity.

Ans: A loudspeaker works by combining electricity and magnetism. When an electric current flows through a coil of wire attached to a diaphragm (a thin, flexible material), it becomes an electromagnet. This coil is placed near a permanent magnet.

As the electric current varies, the electromagnet’s polarity changes, causing it to be attracted and repelled by the permanent magnet. This motion makes the diaphragm vibrate, which in turn creates sound waves in the air that we hear as sound. The louder the electric current varies, the more the diaphragm vibrates, resulting in louder sounds. This process allows us to enjoy music and other audio from speakers.


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