Have an account?
Skip to Content
Build your own quiz
22 questions
Show Answers
See Preview
- 1. Multiple Choice
The given circuit is an example of __________ effect of electric current
Magnetic effect
Heating effect
Chemical effect
- 2. Multiple Choice
The instrument used to separate iron scrap from the junk yard that uses magnetic effect is
- 3. Multiple Choice
Magnetic effect of electric current was invented by
Coulomb
Oersted
Joule
- 4. Multiple Choice
When current is passed through a wire, it behaves like
Conductor
Magnet
Insulator
- 5. Multiple Choice
A current carrying conductor behaves like a magnet
till the current is flowing throuhg it
even though current is not passing
none of the above
- 6. Multiple Choice
Rajan made an electromagnet by winding 50 turns of the wire over an iron screw. Priya also made an electromagnet by winding 100 turns of the wire over an iron screw. which electromagnet will attract more pins?
Rajan's Electromagnet
Priya's Electromagnet
Both attract same number of pins
- 7. Multiple Choice
The magnetic strength of a conductor decreases with the increase in current
True
False
None of the above
- 8. Multiple Choice
It is important to use electrical appliances with _______ marks on it.
ISI
SIS
SSS
ASA
- 9. Multiple Choice
The hammer is attatched to the __________ which in turn strikes the _________.
Gong; Iron strip
Iron Strip; Gong
Electromagnet; Switch
Switch; Iron Strip
- 10. Multiple Choice
Q1. If in a circuit diagram containing a cell and nichrome wire tied between two nails, the cell is replaced by a battery then what will happen to the nichrome wire?
A)It gets red hot slowly.
B)No change in the temperature take place.
C)It will get red hot quickly.
D)The wire will break due to increase in strength of current.
- 11. Multiple Choice
Q3. Which among the following are the advantages of heating effect of current?
1.Can be used in electric fuse
2.Increases the life of several appliances in the circuit.
3.It helps in preventing loss of energy.
- 12. Multiple Choice
Q5. Tungsten is used for the manufacture of an electric bulb because
A)it is malleable
B) it is inexpensive
C) it has a very high melting point
D) it is a good conductor
- 13. Multiple Choice
Q10. Select the one that you will prefer to make an electromagnet.
A) Steel
B) Plastic
C) Stainless steel
D) Soft iron
- 14. Multiple Choice
element of an electric iron is made up of
nickel
chromium
nichrome
tungsten
- 15. Multiple Choice
A fuse wire is an alloy of ________ and _______ .
Steel and copper
iron and nickel
lead and tin
cobalt and iron
- 16. Multiple Choice
Full form of MCB is ?
Miniature Circuit Breaker
Minute Circuit Builder
Both of these
None of these
- 17. Multiple Choice
Which of the following cannot be an example for the use of electromagnets
Electric Bell
Doorbells
Oven
Phone
- 18. Multiple Choice
When an electric current flows through a copper wire AB as shown in Figure, the wire:
deflects a magnetic needle placed near it
becomes red hot
gives electric shock
behaves like a fuse
- 19. Multiple Choice
Why people prefer to put an MCB in their house instead of fuse nowadays- (Choose one or more options)
They are cheap.
Fuses need to be changed every time they blow out.
MCBs can be controlled manually.
Fuses are expensive.
- 20. Multiple Choice
Electromagnets are not used to lift heavy loads.
True
False
- 21. Multiple Choice
The magnitude of magnetism produced by an electric current in a wire depends upon- (a) Increases with an increase in the strength of electric current (b) Decreases, as the distance from the wire increases
Both a, b
Only a
Only b
None
- 22. Multiple Choice
Connection of more than one device/ appliance to a single socket is called-
part of g.k
Overloading
Short circuit
Both
- Answer choicesTagsAnswer choicesTags