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- 1. Multiple Choice
Full form of MCB is
miniature circuit breaker
most circuit breaker
maximum circuit breaker
none of these
- 2. Multiple Choice
Which component of a circuit converts chemical energy into electrical energy?
Electric cell
Electric bell
Connecting wires
Electric switch
- 3. Multiple Choice
Which of the following appliances does not use the heating effect of current?
Electric heater
Electric bell
Electric geyser
Electric bulb
- 4. Fill in the Blank
Name the metal used to make filament of a bulb.
- 5. Multiple Choice
Who discovered heating effect of electric current?
Thomas Alva Edison
James Prescott Joule
Andre Marie Ampere
Alessandro Volta
- 6. Multiple Choice
The element of electric iron is made of copper.
TRUE
FALSE
- 7. Multiple Choice
Name the material used to make fuse wire.
Tin
Copper
Tungsten
Alloy of tin and lead
- 8. Multiple Choice
What is the SI unit of current?
Ampere
Volt
Joule
Calorie
- 9. Multiple Choice
Name the appliance which detects the presence of current in the circuit.
Electric bulb
Electric cell
Electric switch
Ammeter
- 10. Fill in the Blank
__________ automatically trips when there is excess of current in the circuit.
- 11. Multiple Choice
What is the role of voltmeter in a circuit?
To measure current in the circuit
To measure potential difference in the circuit
To detect current in the circuit
None of these
- 12. Multiple Choice
The bulb is not glowing in this circuit. What can be reasons for this?
Switch is open
Circuit is broken
Battery is connected properly
All of these
- 13. Multiple Choice
What are responsible for the flow of electric current?
protons
Electrons
neutrons
atoms
- 14. Multiple Choice
Why Tin-Lead alloy is used to make fuse?
Due to its low melting point
Due to high melting point
Due to its brittleness
None of these
- 15. Multiple Choice
When too many appliances draw large amount of current at the same time, it is known as
Short circuiting
heating effect
Overloading
- 16. Multiple Choice
Identify the symbol for battery
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