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Physics
Electromagnet and permanent magnet
How are the magnets kept safely? What is the role of keepers in storing the magnets?
Physics
Electromagnet and permanent magnet
Name two devices in which electromagnet is used and two devices where permanent magnets are used.

Physics
Electromagnet and permanent magnet
State any two advantages of electromagnets over permanent magnets.

Physics
Electromagnet and permanent magnet
Which of the following is used to make permanent magnets?
A. Alnico
B. Steel
C. Iron
D. Brass
Physics
Electromagnet and permanent magnet
Name two devices in which electromagnets are used and also name two devices where permanent magnets are used:
Physics
Electromagnet and permanent magnet
The north south polarities of an electromagnet can be found easily by using:
Physics
Electromagnet and permanent magnet
Give one advantage of an electromagnet over a static magnet.
Physics
Electromagnet and permanent magnet
What is a temporary magnet ?
Physics
Electromagnet and permanent magnet
What is the working principle of an electromagnet ?
Physics
Electromagnet and permanent magnet
Factors affecting the strength of an electromagnet
A. The number of turns in the coil
B. The current flowing in the coil
C. The length if air gap between the poles
D. All
Physics
Electromagnet and permanent magnet
Which of the following doesn’t use electromagnet?
(A) Electric bell
(B) Electric fan
(C) Magnetic stickers
(D) Televisions
Physics
Electromagnet and permanent magnet
State two ways through which the strength of an electromagnet can be increased.
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