Electronic Devices

Q. Write true or false for this statement:
A switch is an on-off device in an electric circuit.

1. false
2. true

Q. Match the following symbols with their component name.

1. Battery
2. Open Switch
3. Bulb

Q. At home you must have seen switch boards. They have buttons. When you press button on the switch board, you see that the bulb, fan or fridge gets on. Through that button, the circuit is attached that helps in switching on and off. The component used for making and breaking a circuit is known as ________

1. Wire

2. Switch

3. Battery

4. Plug

Q.

Select the correct option:

Statement 1: Following figure represents the switch in ‘ON’ position.

Statement 2: When switch is in ‘ON’ position current does not flow through the circuit.

1. Both statements are true.

2. Statement 1 is true and Statement 2 is false.

3. Statement 1 is false and Statement 2 is true.

4. Both statements are false.

Q.

Two or more cells can be joined together to form a ______________.

1. resistor

2. transistor

3. battery

4. motor

Q. A circuit with a bulb, a switch and two identical cells is shown in the image. The bulb in the circuit does not glow.

Which of the following labelled parts is responsible for this?

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

Q. Switch is an electrical component which:

1. connects or disconnects a part of the circuit.
2. increases or decreases the power in the circuit.
3. increases or decreases the current in the circuit.
4. changes the resistance in the circuit.

Q.

Select the correct option:

Statement 1: Following figure represents the switch in ‘ON’ position.

Statement 2: When switch is in ‘ON’ position current does not flow through the circuit.

1. Both statements are true.

2. Statement 1 is true and Statement 2 is false.

3. Statement 1 is false and Statement 2 is true.

4. Both statements are false.

Q.

is switch essential while constructing an electric circuit. why? explain

Q. An electric cell has three terminals.

1. True
2. False

Q. Which of the following represents the symbol for a series combination of cells?

1. 
2. 
3. 
4. 

Q. Switch is a device which can open or close a circuit.

1. True
2. False

Q. Name the circuit component that is used to start or stop the flow of current in a circuit.