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Heating Effects of Electric Current Video Lecture | Science Class 7 (Old NCERT)

FAQs on Heating Effects of Electric Current Video Lecture - Science Class 7 (Old NCERT)

1. What is the heating effect of electric current?

Ans. The heating effect of electric current refers to the production of heat when an electric current passes through a conductor. This effect is caused by the resistance offered by the conductor to the flow of electrons. The greater the resistance, the more heat is produced.

2. How does the heating effect of electric current work?

Ans. When an electric current flows through a conductor, the electrons collide with the atoms in the conductor. These collisions generate kinetic energy, which is converted into heat energy. The more collisions that occur, the greater the heating effect.

3. What are the applications of the heating effect of electric current?

Ans. The heating effect of electric current has various practical applications. It is used in electric heaters, electric stoves, soldering irons, and incandescent light bulbs, where the desired outcome is the production of heat. It is also utilized in electrical appliances like hair dryers and toasters.

4. How is the heating effect of electric current calculated?

Ans. The heating effect of electric current can be calculated using the formula: Heat produced (H) = I^2 * R * t, where I is the current flowing through the conductor, R is the resistance of the conductor, and t is the time for which the current flows.

5. How can the heating effect of electric current be controlled?

Ans. The heating effect of electric current can be controlled by using conductors with lower resistances. This can be achieved by using materials with high electrical conductivity, such as copper or silver, which offer less resistance to the flow of electrons. Additionally, the use of fuses and circuit breakers helps to prevent excessive heating by interrupting the circuit when the current exceeds a certain limit.

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Sep 05, 2025 Last updated

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	Science Class 7 (Old NCERT) 111 videos\|435 docs\|28 tests

Science Class 7 (Old NCERT)

111 videos|435 docs|28 tests

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