Question

When AC is switched on the thin metallic disc is found to thrown up in air.

1. Which makes the disc to thrown?

2. How will you explain the mechanism behind the movement of disc

3. Write the working principle of induction heater.

Answer 1

1. Eddy current produced in the coil thrown disc into air. 

2. Whenever the magnetic flux linked with a metal block changes, induced currents are produced due to this current, disc becomes a magnet. Hence disc thrown up in to air.

3. The change in flux produces eddy current in a metal. The heat produced by eddy current is used for cooking in induction heater.