When current is switched ‘on’ in a room heater, it ______.

रिकाम्या जागा भरा

When current is switched ‘on’ in a room heater, it becomes red hot and emits heat.

Explanation:

The working of a room heater is based on the heating effect of electric current, which converts electrical energy into heat energy to warm the room.

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पाठ 10: Electric Current and Its Effects - Exercises [पृष्ठ १२०]

पाठ 10 Electric Current and Its Effects
Exercises | Q 8. (c) | पृष्ठ १२०

How does the resistance of a wire vary with its area of cross-section?

What is meant by the heating effect of current? Give two applications of the heating effect of current.

Give a scientific reason.

Tungsten metal is used to make a solenoid type coil in an electric bulb.

In an electric bulb, coil of _______ metal is used.

An electric bulb is connected to a 220 V generator. The current is 0.50 A. What is the power of the bulb?

B₁, B₂ and B₃ are three identical bulbs connected as shown in Figure. When all the three bulbs glow, a current of 3A is recorded by the ammeter A.

What happens to the glow of the other two bulbs when the bulb B₁ gets fused?
What happens to the reading of A₁, A₂, A₃ and A when the bulb B₂ gets fused?
How much power is dissipated in the circuit when all the three bulbs glow together?

What is Joule’s heating effect? How can it be demonstrated experimentally? List its four applications in daily life.

An electric component used as a safety device is electric circuit is ______.

What are the factors affecting heating effect of electric current?

Match the following