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Question (21)

QN003905

Dropping a magnet repeatedly causes:

(A) Stronger magnet
(B) Demagnetisation
(C) Polarity change
(D) No effect

Correct Answer: B

Explanation:

Shock misaligns magnetic domains

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Question (22)

QN003906

Frog hopping occurs due to:

(A) Gravity only
(B) Alternating repulsion and attraction
(C) No force
(D) Air pressure

Correct Answer: B

Explanation:

Changing poles causes alternating forces

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Question (23)

QN003907

Strongest magnet is the one that:

(A) Picks fewest clips
(B) Picks most clips
(C) Picks none
(D) Breaks first

Correct Answer: B

Explanation:

More clips indicate stronger magnetic force

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Question (24)

QN003908

Compass needle always aligns:

(A) East-West
(B) North-South
(C) Random
(D) Up-down

Correct Answer: B

Explanation:

Earth’s magnetic field aligns needle

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Question (25)

QN003909

Glass between magnet and steel ball:

(A) Stops motion
(B) No change
(C) Doubles speed
(D) Breaks ball

Correct Answer: B

Explanation:

Magnetic force passes through glass

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Question (26)

QN003910

Broken magnet pieces total poles:

(A) 2
(B) 4
(C) 6
(D) 3

Correct Answer: C

Explanation:

Each piece forms North and South pole

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Question (27)

QN003911

Copper ball under magnet will:

(A) Move fast
(B) Stay still
(C) Repel
(D) Melt

Correct Answer: B

Explanation:

Copper is non-magnetic

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Question (28)

QN003912

Maglev trains use:

(A) Diesel power
(B) Magnetic levitation
(C) Steam engine
(D) Cable system

Correct Answer: B

Explanation:

They float using magnetic repulsion

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Question (29)

QN003913

Mobile phones are affected by magnets because:

(A) Battery drains
(B) Data/components may be disturbed
(C) Plastic melts
(D) Weight increases

Correct Answer: B

Explanation:

Strong magnetic fields disrupt electronics

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Question (30)

QN003914

Cabinet magnetic latch uses door material:

(A) Aluminium
(B) Plastic
(C) Soft iron/steel
(D) Brass

Correct Answer: C

Explanation:

Iron/steel is attracted to magnet

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Question (21)

Dropping a magnet repeatedly causes:

Explanation:

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Question (22)

Frog hopping occurs due to:

Explanation:

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Question (23)

Strongest magnet is the one that:

Explanation:

Link:

Question (24)

Compass needle always aligns:

Explanation:

Link:

Question (25)

Glass between magnet and steel ball:

Explanation:

Link:

Question (26)

Broken magnet pieces total poles:

Explanation:

Link:

Question (27)

Copper ball under magnet will:

Explanation:

Link:

Question (28)

Maglev trains use:

Explanation:

Link:

Question (29)

Mobile phones are affected by magnets because:

Explanation:

Link:

Question (30)

Cabinet magnetic latch uses door material:

Explanation:

Link:

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