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- 1. Multiple Choice
_______________ is a safety device which works on heating effect of electric current.
Battery
Fuse
Bulb
- 2. Multiple Choice
'+' is the ________ sign whereas '-' is the _________ sign.
negative, positive
positive, negative
- 3. Multiple Choice
what is this symbol of?
Electric cell
Electric bulb
switch 'on' position
wire
- 4. Multiple Choice
the symbol of switch 'off' position
- 5. Multiple Choice
When the bulb gets fused, its filament is broken.
True
False
- 6. Multiple Choice
Give one example for heating effect of the electric current.
The wire gets hot when an electric current passes through it
The bulb gets cold when an electric current passes through it
- 7. Multiple Choice
what is this?
Socket
Miniature Circuit Breaker
- 8. Multiple Choice
_________________ was the first person who noticed the deflection of compass needle every time the current was passed through the wire.
Stephen Hawking
Albert Einstein
Thomas Alva Edison
Hans Christian Oersted
- 9. Multiple Choice
The symbol is ______
battery
Wire
Electric bulb
- 10. Multiple Choice
Urvashi made a circuit and saw that some pins kept nearby were being attracted to the wires this is due to the __________ effect of electric current.
Heating
Gravitational
Magnetic
Attractive
- 11. Multiple Choice
Electric Bell works on the principle of-
Magnetism
Electromagnetism
Gravitation
Static Electricity
- 12. Multiple Choice
What is the full form of MCB-
Massive Circuit Breaker
Massive Circuit Body
Mighty Circuit Breaker
Miniature Circuit Breaker
- 13. Multiple Choice
The amount of heat produced in a wire depends on
material
length
thickness
all of these
- 14. Multiple ChoiceTo have a complete electric circuit, the path must be _____smallclosedbigopen
- 15. Multiple ChoiceMetals such as copper and aluminum are good ______________.insulatorsconductorscircuitscharges
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