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The correct pattern of… (Class 10 Science 2023, Q14)

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ScienceCBSE Class 10 · Board exam 2023, set 31/4/1 · 1 mark · MCQ

CBSE Class 10 Science 2023: question 14

Set in the CBSE Class 10 board exam of 2023, paper 31/4/1, section A, question 14, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q14 · 1 mark · MCQMagnetic Effects of Electric Current

The correct pattern of magnetic field lines of the field produced by a current carrying circular loop is :

  1. (A)Pattern (a) shown in figure
  2. (B)Pattern (b) shown in figure
  3. (C)Pattern (c) shown in figure
  4. (D)Pattern (d) shown in figure

Figure in the paper: Four diagrams, each showing a circular loop of wire connected to a battery (+ and -) with the magnetic field lines drawn around it and an N-S axis line marked. Pattern (a) and (c) show field lines encircling the wire loop with field lines crossing the loop region; (b) and (d) differ in the field line pattern near the loop. Options (a)-(d) are the four different patterns. See it in the official paper.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/4/1.

Hints

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

Hint 1

Treat each part of the loop like a straight wire.

Hint 2

At the centre, the fields from all parts of the loop add up in the same direction.

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 lines form concentric circles around each point where the wire crosses the plane. Near the centre of the loop they become almost straight and all point in the same direction.

  2. According to the scheme, pattern (c) shows this correctly, so the answer is option (C).

    1 mark

Answer: Option (C)

Where the marks are

  • Selects the correct pattern (c) (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Magnetic Effects of Electric Current, one at a time, marked against the answer key and marking points.Back to the full paper2023 board paper, set 31/4/1: 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.