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CBSE Class 12 Electrical Appliances Marking Scheme 2027

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Frequently Asked Questions

How does an electric heater produce heat?

An electric heater produces heat by passing electric current through a resistive element, converting electrical energy into thermal energy.

Why is earthing important for electrical safety?

Earthing provides a safe path for excess electricity to flow into the ground, preventing electric shocks and ensuring safety during faults.

What function do circuit breakers serve?

Circuit breakers automatically interrupt power supply during overloads or short circuits to protect wiring and prevent fires.

How does a light bulb emit light?

A light bulb emits light when an electric current heats its filament or excites gas atoms inside it until they glow.

What are semiconductors used for?

Semiconductors control electron flow in electronic devices like transistors and integrated circuits due to their variable conductivity properties.

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