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Question (1)

QN003885

According to safety guidelines, magnets must be kept away from which group of items to prevent damage or malfunction?

(A) Wooden tables and glass bowls
(B) Plastic scales and steel paper clips
(C) Mobile phones and remote controls
(D) Matchboxes and cardboard trays

Correct Answer: C

Explanation:

Strong magnets can damage electronic components in mobile phones and remote controls

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Question (2)

QN003886

When commercial magnets are not marked N and S, the North pole is sometimes identified by which marker?

(A) Bright green line
(B) White dot
(C) Brass groove
(D) Yellow square

Correct Answer: B

Explanation:

Some magnets indicate North pole with a white dot

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Question (3)

QN003887

In colored magnets, which color represents the South pole?

(A) Red
(B) Green
(C) Blue
(D) Yellow

Correct Answer: C

Explanation:

South pole is commonly shown in blue

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Question (4)

QN003888

How should bar magnets be stored safely in pairs?

(A) Like poles same direction
(B) Unlike poles on same side with wood separator
(C) Stacked vertically
(D) Kept in separate metal boxes

Correct Answer: B

Explanation:

Unlike poles together with wooden separator prevents demagnetisation

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Question (5)

QN003889

What is placed across ends of bar magnets during storage?

(A) Cardboard
(B) Copper foil
(C) Soft iron pieces
(D) Wood blocks

Correct Answer: C

Explanation:

Soft iron completes magnetic circuit and preserves strength

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Question (6)

QN003890

The 'matsya-yantra' used which shape for magnetised iron?

(A) Circular ring
(B) Flat needle
(C) Fish
(D) Cylinder

Correct Answer: C

Explanation:

It was fish-shaped as “matsya” means fish

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Question (7)

QN003891

In matsya-yantra, the magnetised piece was placed in which fluid?

(A) Water
(B) Oil
(C) Mercury
(D) Saltwater

Correct Answer: B

Explanation:

Oil allows free rotation of magnetised fish

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Question (8)

QN003892

Fill in blank: “Do not heat me or drop me or ____ me.”

(A) paint
(B) hammer
(C) wash
(D) scratch

Correct Answer: B

Explanation:

Heating, dropping, hammering demagnetise magnets

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Question (9)

QN003893

In the hopping frog activity, ring magnets are fixed in which pattern?

(A) All North up
(B) Alternating North-South
(C) All South up
(D) Random

Correct Answer: B

Explanation:

Alternating poles create repulsion and attraction effects

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Question (10)

QN003894

Two matchbox magnet cars with North-North facing will:

(A) Move towards each other
(B) Stay stationary
(C) Repel each other
(D) Spin in circles

Correct Answer: C

Explanation:

Like poles repel

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Question (1)

According to safety guidelines, magnets must be kept away from which group of items to prevent damage or malfunction?

Explanation:

Link:

Question (2)

When commercial magnets are not marked N and S, the North pole is sometimes identified by which marker?

Explanation:

Link:

Question (3)

In colored magnets, which color represents the South pole?

Explanation:

Link:

Question (4)

How should bar magnets be stored safely in pairs?

Explanation:

Link:

Question (5)

What is placed across ends of bar magnets during storage?

Explanation:

Link:

Question (6)

The 'matsya-yantra' used which shape for magnetised iron?

Explanation:

Link:

Question (7)

In matsya-yantra, the magnetised piece was placed in which fluid?

Explanation:

Link:

Question (8)

Fill in blank: “Do not heat me or drop me or ____ me.”

Explanation:

Link:

Question (9)

In the hopping frog activity, ring magnets are fixed in which pattern?

Explanation:

Link:

Question (10)

Two matchbox magnet cars with North-North facing will:

Explanation:

Link:

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