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- 1. Multiple Choice
Which of the following devices does not work on heating effect of current?
electric bulb
fuse
electric bell
immersion rod
- 2. Multiple Choice
On what principle is electric bell based?
heating effect of current
magnetic effect of current
- 3. Multiple Choice
What is the full form of MCB?
Miniature Circuit Board
Miniature Circuit Breaker
Multimeter Circuit Board
- 4. Multiple Choice
What is the direction of conventional current flow?
from positive terminal to negative terminal
from positive terminal to positive terminal
from negative terminal to positive terminal
from negative terminal to negative terminal
- 5. Multiple Choice
Which wire would have more resistance?
long and thick
short and thick
long and thin
short and thin
- 6. Multiple Choice
In which wire, the heat produced would be minimum?
Copper wire of length 10 cm
Copper wire of length 20 cm
Nichrome wire of length 10 cm
Tungsten wire of length 20 cm
- 7. Multiple Choice
Identify correct statements. (Select all correct options)
The filament type electric bulbs are power-efficient.
CFLs do not work on the heating effect of current.
CFLs are more expensive than electric bulb.
CFLs consume more electricity than electric bulb.
- 8. Multiple Choice
Electric fuse, when gets heated too much, breaks
electrical appliances
electric current
electric circuit
short-circuit
- 9. Multiple Choice
Which of the following devices work on heating effect of the current? (Select all correct options)
Electric bulb
Electric iron
Electric bell
Fuse
immersion rod
- 10. Multiple Choice
Which of the following devices work on heating effect of the current? (Select all correct options)
Electric oven
Loudspeakers
Cranes with strong electromagnet
Telegraph
Electric kettle
- 11. Multiple Choice
What is true about electromagnets? (Select all correct options)
Their magnetism can be altered
When electric current is switched off, it does not behave like a magnet.
They cannot be as strong as a permanent magnet
Magnetism in electromagnet is natural.
- 12. Multiple Choice
What are the factors on which the strength of an electromagnet depend?
1. number of turns of the coil
2. strength of electric current
3. both 1 and 2
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