Electricity: Circuits and their Components

These flashcards cover key concepts of electricity, circuits, and their components based on the lecture notes.

What is the Bhakra Nangal Dam used for?

It is used to generate electricity through hydroelectric power.

What type of energy is generated by hydroelectric power?

Electricity from the force of falling water.

Name one use of electricity in entertainment.

Television.

List an example of communication using electricity.

Mobile phone.

What is one use of electricity in cooking?

Microwave.

What is an electric cell?

A portable source of electrical energy.

What are the two terminals of an electric cell called?

Positive (+ve) and negative (–ve).

What is a battery?

A combination of two or more electric cells.

What is the function of a switch in a circuit?

To complete or break the circuit.

What type of lamp is commonly used in torches?

Incandescent lamp.

Describe how an LED operates in a circuit.

An LED only glows when connected correctly, with the positive terminal to the positive of the battery.

What happens when the filament of an incandescent lamp is broken?

The lamp is said to be 'fused' and does not glow.

What are conductors?

Materials that allow electric current to flow easily.

Give an example of an electrical insulator.

Plastic.

What is the direction of electric current in a circuit?

From the positive to the negative terminal of the electric cell.

What is a circuit diagram?

A representation of an electrical circuit using symbols.

What is the difference between Direct Current (DC) and Alternating Current (AC)?

DC powers small devices, while AC comes from power plants and powers larger appliances.

What role do insulators play in electrical systems?

They cover wires and devices to prevent electric shocks.

Why is copper commonly used for electrical wiring?

Because it is a good conductor and is more cost-effective.

How can you identify a broken filament in an incandescent lamp?

The lamp does not glow even when connected to a power source.

What must be true for an electric lamp to glow in a circuit?

The circuit must be complete for current to flow.