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When we move magnetic… (Class 12 Physics SQP 2025-26, Q12)

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PhysicsCBSE Class 12 · Sample paper, session 2025-26 · 1 mark · MCQ

CBSE Class 12 Physics sample paper 2025-26: question 12

From the official CBSE sample question paper for 2025-26, section A, question 12, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q12 · 1 mark · MCQMagnetism and Matter

When we move magnetic compass from point P to Q then which of the following statement is true

  1. (A)The deflection of the magnetic needle at P and Q will be in the same direction.
  2. (B)The deflection of the magnetic needle at P and Q will be in the opposite directions.
  3. (C)The deflection of the magnetic needle at P and Q will be perpendicular to each other.
  4. (D)The deflection of the magnetic needle at P and Q will be inclined at with respect to each other.

Figure in the paper: A horizontal solenoid carrying current I (marked at its ends); point P lies on the solenoid's axis to the right, and point Q lies on a vertical line above the middle of the solenoid. See it in the official paper.

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2025-26.

Hints

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

Hint 1

Treat the solenoid as a bar magnet.

Hint 2

Compare the field direction on the axis with that on the equatorial line.

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. A solenoid behaves like a bar magnet.

  2. On the axis (P) the field is along the axis. At an equatorial point (Q) the field is antiparallel to the axial field, so the needle points in opposite directions at P and Q. Option (B).

    1 mark

Answer: Option (B)

Where the marks are

  • Uses the bar-magnet analogy: equatorial field is antiparallel to axial field (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 2025-26: 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.