Which of the following is NOT based on the heating effect of current?

Question

Question

This question was previously asked in

RRC Group D Previous Paper 38 (Held On: 10 Oct 2018 Shift 2)

Answer 1

The correct answer is the Microwave.

Key Points

A microwave oven uses microwaves to heat food.
In the case of microwave ovens, the commonly used radio wave frequency is roughly 2,500 megahertz (2.5 gigahertz).
Radio waves in this frequency range absorbed by water, fats, and sugars. When they are absorbed they are converted directly into atomic motion or vibration.
Therefore heavy motion or vibration is converted into heat.

Important Points

Microwaves are not absorbed by most plastics, glass, or ceramics.
The frequency of the Microwave equals the resonance frequency of water. Therefore foods could be heated up by the oscillation of water molecules.

Additional Information

An Electric heater, Electric blub (with filament), Electric iron is the electrical device that converts an electric current into heat.
They working on the principle of the Joule heating effect.
- An electric current passing through a resistor will convert that electrical energy into heat energy.