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Question (11)

QN003895

Why does a paper clip follow a magnet through glass?

(A) Water amplifies magnetism
(B) Force acts through non-magnetic materials
(C) Glass becomes magnetic
(D) Buoyancy effect

Correct Answer: B

Explanation:

Magnetic force passes through glass and water

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Question (12)

QN003896

Steel balls under cardboard moved by magnet will:

(A) Fly upward
(B) Stay still
(C) Follow magnet path
(D) Scatter randomly

Correct Answer: C

Explanation:

Cardboard does not block magnetic field

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Question (13)

QN003897

Floating ring magnet implies:

(A) No magnetism
(B) Unlike poles facing
(C) Like poles facing
(D) Gravity absent

Correct Answer: C

Explanation:

Repulsion occurs between like poles

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Question (14)

QN003898

If bottom magnet is South, top magnet bottom must be:

(A) North
(B) South
(C) None
(D) Either

Correct Answer: B

Explanation:

Like poles repel for levitation

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Question (15)

QN003899

Turning top magnet upside down in levitation causes:

(A) No change
(B) Repulsion
(C) Attraction and fall
(D) Floating higher

Correct Answer: C

Explanation:

Poles become opposite so attraction pulls it down

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Question (16)

QN003900

If end 1 is North, correct sequence is:

(A) 2=N,3=S,4=N...
(B) 2=S,3=S,4=N...
(C) 2=S,3=N,4=S...
(D) 2=N,3=N,4=S...

Correct Answer: C

Explanation:

Adjacent touching magnets align opposite poles

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Question (17)

QN003901

For 4 magnets storage, required pieces are:

(A) 2 wood, 4 iron
(B) 4 wood, 2 iron
(C) 1 wood, 2 iron
(D) 2 wood, 2 iron

Correct Answer: A

Explanation:

Two pairs each need wood and iron keepers

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Question (18)

QN003902

Magnetising screwdriver is done by:

(A) Heating
(B) Rubbing magnet in one direction
(C) Wrapping cardboard
(D) Washing

Correct Answer: B

Explanation:

Stroking with magnet aligns domains

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Question (19)

QN003903

Paper clip chain forms because:

(A) Adhesive coating
(B) Induced magnetism
(C) Reduced weight
(D) Air conduction

Correct Answer: B

Explanation:

First clip becomes temporarily magnetised

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Question (20)

QN003904

If repulsion occurs between known N pole and unknown end, unknown is:

(A) South
(B) North
(C) Iron
(D) Charge

Correct Answer: B

Explanation:

Repulsion occurs only between like poles

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Question (11)

Why does a paper clip follow a magnet through glass?

Explanation:

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Question (12)

Steel balls under cardboard moved by magnet will:

Explanation:

Link:

Question (13)

Floating ring magnet implies:

Explanation:

Link:

Question (14)

If bottom magnet is South, top magnet bottom must be:

Explanation:

Link:

Question (15)

Turning top magnet upside down in levitation causes:

Explanation:

Link:

Question (16)

If end 1 is North, correct sequence is:

Explanation:

Link:

Question (17)

For 4 magnets storage, required pieces are:

Explanation:

Link:

Question (18)

Magnetising screwdriver is done by:

Explanation:

Link:

Question (19)

Paper clip chain forms because:

Explanation:

Link:

Question (20)

If repulsion occurs between known N pole and unknown end, unknown is:

Explanation:

Link:

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