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An electric kettle is rated 750… (Science 2025 31/2/1 Q26)

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ScienceCBSE Class 10 · Board exam 2025, set 31/2/1 · 2 marks · Very short answer

CBSE Class 10 Science 2025: question 26

Set in the CBSE Class 10 board exam of 2025, paper 31/2/1, section B, question 26, for 2 marks. Try it first; the hints and our step-by-step solution are below.

Q26 · 2 marks · Very short answerCompetency-basedElectricity

An electric kettle is rated 750 W; 220 V. Can this kettle be used in a circuit which has a fuse of current rating 3 A? Give reason for your answer.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2025 board paper, set 31/2/1.

Hints

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

Hint 1

Find the current the kettle draws using power and voltage.

Hint 2

Compare this current with the fuse rating. What happens to a fuse when the current exceeds its rating?

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. Given: , . Current drawn:

    ½ mark

  2. No, this kettle cannot be used in this circuit.

    ½ mark

  3. Reason: the kettle draws 3.4 A, which is more than the fuse rating of 3 A. The fuse wire will heat up and melt, which breaks the circuit, so the kettle will not work.

    1 mark

Answer: I ≈ 3.4 A > 3 A, so No; the fuse will melt and break the circuit.

Where the marks are

  • Calculates I = P/V ≈ 3.4 A (½ mark)
  • States that it cannot be used (½ mark)
  • Reason: current exceeds the 3 A fuse rating, so the fuse melts (1 mark)

Revise the chapter

  • Chapter: Electricity (notes, formulas, where marks are lost and every past question)
Practise this chapterBoard-style questions from Electricity, one at a time, marked against the answer key and marking points.Back to the full paper2025 board paper, set 31/2/1: 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.