CBSE Class 7 Science Electricity: Circuits and Their Components (Class 7 NCERT New) Quiz 2

1. Which situation represents an open circuit?

A The switch is ON and the lamp glows. B The switch is OFF, leaving a gap in the circuit. C The battery has two cells. D The wires are made of copper.

2. Which statement best explains the role of an electric switch?

A It generates electric current. B It stores electrical energy. C It controls current by completing or breaking the circuit. D It converts electrical energy into light.

3. What is the purpose of using standard symbols in circuit diagrams?

A Increase current flow. B Reduce the number of components. C Make circuits easier to draw and understand. D Improve battery life.

4. In the symbol of an electric cell, the longer line represents the:

A Negative terminal. B Wire. C Positive terminal. D Switch.

5. If a student incorrectly labels the longer line in a cell symbol as the negative terminal, which concept is affected?

A Direction of current. B Function of the switch. C Shape of the lamp. D Material of the wire.

6. In the symbol of an LED, the triangle indicates:

A The brightness of the LED. B The direction in which current can flow. C The positive terminal only. D The colour of emitted light.

7. In the LED symbol, the two arrows indicate that the LED:

A Stores current. B Blocks current. C Emits light. D Produces heat.

8. Which statement about circuit diagrams is correct?

A They use photographs of components. B They are drawn using standard symbols.

9. Why are standard electrical symbols used worldwide?

A To make batteries stronger B To increase safety only C To help people understand circuits in the same way D To reduce manufacturing cost

10. A tester lamp glows when connected across Object X. Which conclusion is fully justified?

A Object X is a conductor B Object X is copper C Object X is silver D Object X is magnetic