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A ball of superconductin… (Class 12 Physics SQP 2026-27, Q8)

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PhysicsCBSE Class 12 · Sample paper, session 2026-27 · 1 mark · MCQ

CBSE Class 12 Physics sample paper 2026-27: question 8

From the official CBSE sample question paper for 2026-27, section A, question 8, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q8 · 1 mark · MCQMagnetism and Matter

A ball of superconducting material is dipped in liquid nitrogen and placed near a bar magnet. The direction of the movement of the ball and the magnetic moment would be-

  1. (A)Direction of movement of ball: Towards the bar magnet; magnetic moment: Opposite to that of the bar magnet
  2. (B)Direction of movement of ball: Towards the bar magnet; magnetic moment: Same direction as that of the bar magnet
  3. (C)Direction of movement of ball: Away from the bar magnet; magnetic moment: Same direction as that of the bar magnet
  4. (D)Direction of movement of ball: Away from the bar magnet; magnetic moment: Opposite to that of the bar magnet

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2026-27.

Hints

Open one hint at a time and try again before the next.

Hint 1

What happens to a superconductor's magnetic behaviour below its critical temperature?

Hint 2

How does a diamagnetic material respond to a magnet?

Step-by-step solution

Each step shows the marks it earns, as an examiner would award them. Checked by an independent re-solve from the question paper.

  1. Liquid nitrogen cools the ball below its critical temperature, so it becomes a superconductor and behaves as a perfect diamagnet (Meissner effect).

    ½ mark

  2. A diamagnet acquires a magnetic moment opposite to the applied field and is repelled by the magnet. So it moves away with its moment opposite to the magnet's. Option (D).

    ½ mark

Answer: Away from the magnet; moment opposite, option (D)

Where the marks are

  • Identifies the superconductor as diamagnetic: it is repelled and has an opposite moment (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Magnetism and Matter, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2026-27: every question, by section.

The question is transcribed from the official paper; figures are described in words. The solution, hints and chapter tag are ours. Spotted an error? Write tosupport@questionbuddy.in.