A Simple Electric Circuit

Q.

Define electric circuit.

Q.

A device that breaks or completes a circuit is known as an electric switch.

1. Electric torch

2. Electric switch

Q.

An electric bulb connected to a cell does not glow in a complete circuit. Which of the following can be the reason?

1. it is fused

2. No switch is connected to the bulb

3. it is an insulator

4. None of these

Q.

Question 12

An electric bulb is connected to a cell through a switch as shown in Fig. When the switch is brought to ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it? Mention any two of them.

Q. Which of the following statements about an electric circuit is/are true?

1. The circuit can be closed only when the switch is in ON position.
2. The circuit can be closed only when the switch is in OFF position.
3. The wires should not have any breaks or gaps for circuit to be closed.
4. It should have only one electric cell.

Q.

A circuit is a path through which electricity flows.

1. True
2. False

Q. What is the least number of switches you would need to light up the bulb?

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

Q.

Differentiate between closed circuit and open circuit.

Q. An electric bulb is connected to a cell through a switch as shown in figure. When the switch is brought to the ‘ON’ position, the bulb does not glow. What could be the possible reason/s for it?

Q.

What is an electric circuit?

Q.

Without a switch, you can't open and close a circuit as you wish with ease. (Unless you use your hands to join and 'un'join the wires, DO NOT do that!)

1. True

2. False

Q.

A circuit is a path through which electricity flows.

1. True
2. False

Q. The components required to make a simple series circuit to light a bulb are:

1. wires and cell
2. cell and switch
3. bulb and wires
4. both Band C

Q. When the circuit is open, the current will flow.

1. True
2. False

Q. The main function of a switch is to:

1. allow charges to flow
2. complete or break a circuit
3. make the bulb glow easily
4. prevent electric shocks

Q. Which of the following are the necessary items required to build a simple circuit with a tester to verify the flow of electricity?

1. Wire
2. Cell / Battery
3. Bulb
4. Switch

Q. Choose the correct option:

Statement 1: The following figure represents the conventional flow of current in a circuit.


Statement 2: The actual direction of flow of electrons is opposite to the conventional direction of the flow of current.

1. Both the statements are correct.
2. Statement 1 is correct but statement 2 is incorrect.
3. Statement 1 is incorrect but statement 2 is correct.
4. Both the statements are incorrect.

Q. Choose the correct option:

Statement 1: The following figure represents the conventional flow of current in a circuit.


Statement 2: The actual direction of flow of electrons is opposite to the conventional direction of the flow of current.

1. Both the statements are correct.
2. Statement 1 is correct but statement 2 is incorrect.
3. Statement 1 is incorrect but statement 2 is correct.
4. Both the statements are incorrect.

Q.

A bulb in ____electric circuit glows.

Q. An electric bulb is connected to a cell through a switch as shown in Fig. 12.7. When the switch is brought in 'ON' position, the bulb does not glow. What could be the possible reason/s for it? Mention any two of them.