Motion of an hammer in electric bell _____

To and fro motion about a fixed point is called oscillatory motion

The motion of the hammer in an electric bell is an example of a specific type of repetitive motion. When the electric bell operates, the hammer moves back and forth in a regular pattern to strike the bell. This back-and-forth movement of the hammer is known as oscillatory motion.

Oscillatory motion refers to the repetitive movement of an object about a fixed point or position. In this type of motion, the object continuously moves to one side and then to the other, passing through its central or equilibrium position. A common characteristic of oscillatory motion is that it occurs in a regular and rhythmic manner, making it predictable.

In the case of an electric bell, when the electric current flows through the circuit, it activates the electromagnet. The electromagnet pulls the hammer towards it, causing it to strike the bell. When the circuit breaks, the hammer returns to its original position, only to be pulled back again when the current flows again. This process repeats rapidly, producing the characteristic ringing sound of the bell.

In summary, the hammer's movement in an electric bell is a classic example of oscillatory motion, which is defined as the to-and-fro motion of an object about a fixed point. This type of motion is seen in various natural and mechanical systems and is essential for the functioning of many devices.