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Ch1_part1_EPO460

Authored by Madam NajwaMahzan

Engineering

University

Used 2+ times

Ch1_part1_EPO460
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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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