Skip to content

Draw the pattern of the… (Class 10 Science 2023, Q32b)

questionbuddy.in/q/cbse-10-science-2023-31-5-1-q32b-draw-pattern-magnetic-field-produced

ScienceCBSE Class 10 · Board exam 2023, set 31/5/1 · 3 marks · Short answer

CBSE Class 10 Science 2023: question 32(b)

Set in the CBSE Class 10 board exam of 2023, paper 31/5/1, section C, question 32(b), for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q32(b) · 3 marks · Short answerMagnetic Effects of Electric Current

Draw the pattern of the magnetic field produced around a vertical current carrying straight conductor passing through a horizontal cardboard. Mark the direction of current and the magnetic field lines. Name and state the rule which is used to determine the direction of magnetic field associated with a current carrying conductor.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/5/1.

Hints

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

Hint 1

What shape do iron filings form around a straight wire carrying current?

Hint 2

Your thumb shows one quantity and your curled fingers show the other.

Hint 3

Make sure the arrows on the circles match the current 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. Diagram: draw a vertical straight wire passing through the centre of a horizontal cardboard, connected to a battery and key. On the cardboard, draw concentric circles centred on the wire, closer together near the wire.

    ½ mark

  2. Mark the direction of current with an arrow on the wire (e.g. upward).

    ½ mark

  3. Mark the direction of the field lines with arrows on the circles. For an upward current they run anticlockwise when viewed from above (reverse them if the current is downward).

    ½ mark

  4. Rule: Right-hand thumb rule.

    ½ mark

  5. Statement: imagine holding the current-carrying straight conductor in your right hand with the thumb pointing in the direction of current. The fingers wrapped around the conductor then give the direction of the magnetic field lines.

    1 mark

Answer: Concentric circular field lines around the wire (anticlockwise from above for upward current); Right-hand thumb rule

Where the marks are

  • Concentric circular field pattern (½ mark)
  • Direction of current marked (½ mark)
  • Direction of field lines marked consistently (½ mark)
  • Names right-hand thumb rule (½ mark)
  • Correct statement of the rule (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 31/5/1: 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.