Symbols of Electric Components

Q. Which generation of computer used a transistor?

1. Third
2. First
3. Fourth
4. Second

Q.

Which of the following is not true of fluorescent lights?

1. They are gas-filled tubes

2. The gas emits visible light when an electric current passes through it.

3. The rays emitted by the gas are absorbed by the coating on the walls of the tubes

4. The walls of the tubes are coated with a fluorescent substance.

Q. The device used to make or break an electric circuit is known as a _________.

Q. Which of the following is used for constructing an electric bulb?

1. Base
2. Filament
3. Glass case
4. All of the above

Q. The positive and negative terminals of an electric cell are _______ and _______ respectively.​

Q. How many north poles do they contain in total?

1. 2
2. 8
3. 4
4. 3

Q. Choose the correct option based on the given statements.
Statement 1: Current in a circuit flows from the positive terminal to the negative terminal of the cell.
Statement 2: Electric bulb has two terminals.

1. Statement 1 is true, statement 2 is false
2. Statement 1 is false, statement 2 is true
3. Both statements are true
4. Both statements are false

Q.

Secondary cells cannot be recharged

1. True
2. False

Q. Help Alex find the circuit in which both the bulbs will glow.

Q.

In a torch, we use ___ as a source of electricity.

1. cell

2. switch

3. generator

4. mains

Q. The device used to make or break an electric circuit is known as a _________.