Ch1_part1_EPO460
Quiz
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Engineering
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University
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Medium
Madam NajwaMahzan
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20 questions
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1.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Which material shows strong attraction to magnetic fields and retains its properties after the external field is removed?
Diamagnetic
Paramagnetic
Ferromagnetic
Non-magnetic
2.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Magnets always have:
One pole only
Two poles
Four poles
No poles
3.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
Which of the following is a permanent magnet?
Transformer core
Fridge door magnet
Paper clip
Electromagnet in a motor
4.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
What happens to a temporary magnet (e.g. a nail near a magnet) once the external magnet is removed?
It stays magnetised forever
It loses magnetism after a short time
It turns into a permanent magnet
It becomes diamagnetic
5.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
An electromagnet becomes stronger when:
Current is reduced
Coil is replaced with a straight wire
Core is ferromagnetic
Air is used as core
6.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
The symbol for magnetic flux is:
H
B
Φ
M
7.
MULTIPLE CHOICE QUESTION
10 sec • 1 pt
The unit of magnetic flux density (B) is:
Weber (Wb)
Tesla (T)
Ampere-turn (At)
Henry (H)
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