Skip to content

What is a solenoid? When does… (Class 10 Science 2023, Q32)

questionbuddy.in/q/cbse-10-science-2023-31-6-1-q32-solenoid-does-solenoid-behave-magnet

ScienceCBSE Class 10 · Board exam 2023, set 31/6/1 · 3 marks · Short answer

CBSE Class 10 Science 2023: question 32

Set in the CBSE Class 10 board exam of 2023, paper 31/6/1, section C, question 32, for 3 marks. Try it first; the hints and our step-by-step solution are below.

Q32 · 3 marks · Short answerMagnetic Effects of Electric Current

What is a solenoid? When does a solenoid behave as a magnet? Draw the pattern of the magnetic field produced inside it showing the directions of the magnetic field lines.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2023 board paper, set 31/6/1.

Hints

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

Hint 1

A solenoid is a special shape of coil. Describe that shape.

Hint 2

Its field pattern looks like that of a bar magnet. What do the lines look like inside it?

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 is a coil of many circular turns of insulated copper wire, wrapped closely in the shape of a cylinder.

    1 mark

  2. A solenoid behaves like a bar magnet when an electric current is passed through it. One end acts as a north pole and the other as a south pole.

    1 mark

  3. Diagram (in words): Draw the coil with the current direction marked by arrows on the turns. Inside the solenoid, draw straight, parallel, equally spaced field lines, showing a uniform field. Outside, draw lines that curve from one end (N) to the other (S), like a bar magnet. Mark the arrows on the field lines.

    1 mark

Answer: A solenoid is a closely wound cylindrical coil of insulated copper wire; it acts as a magnet when current flows; field inside is uniform (parallel straight lines).

Where the marks are

  • Definition of solenoid (1 mark)
  • Behaves as magnet when current is passed (1 mark)
  • Correct field pattern with current and field directions (1 mark; ½ deducted if directions not marked)

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 31/6/1: 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.