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An infinitely long… (Class 12 Physics SQP 2026-27, Q3)

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

CBSE Class 12 Physics sample paper 2026-27: question 3

From the official CBSE sample question paper for 2026-27, section A, question 3, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q3 · 1 mark · MCQElectromagnetic Induction

An infinitely long cylinder is kept parallel to a uniform magnetic field B directed along negative y –axis. What will be the direction of induced current as seen from the y axis?

  1. (A)clockwise of the negative y-axis
  2. (B)anticlockwise of the negative y-axis
  3. (C)no current will be induced
  4. (D)along the direction of the magnetic field

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

An induced current needs a changing magnetic flux.

Hint 2

Is anything moving or changing with time here?

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. The field is uniform and constant, and the cylinder is stationary, so the magnetic flux linked with it does not change.

    ½ mark

  2. Since , no emf is induced and hence no current flows. Option (C).

    ½ mark

Answer: No current will be induced, option (C)

Where the marks are

  • States that the flux is constant, so no current is induced (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Electromagnetic Induction, 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.