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Assertion (A): Electrons move… (Class 10 Science 2024, Q19)

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ScienceCBSE Class 10 · Board exam 2024, set 31/5/1 · 1 mark · Assertion-reason

CBSE Class 10 Science 2024: question 19

Set in the CBSE Class 10 board exam of 2024, paper 31/5/1, section A, question 19, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q19 · 1 mark · Assertion-reasonCompetency-basedElectricity

Assertion (A): Electrons move from lower potential to higher potential in a conductor.

Reason (R): A dry cell maintains electric potential difference across the ends of a conductor.

  1. (A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A).
  2. (B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of the Assertion (A).
  3. (C)Assertion (A) is true, but Reason (R) is false.
  4. (D)Assertion (A) is false, but Reason (R) is true.

Source: official question paper from cbse.gov.in (PDF). See it in the full 2024 board paper, set 31/5/1.

Hints

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

Hint 1

Check whether each statement is true on its own.

Hint 2

Why do electrons flow opposite to conventional current?

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. Electrons are negatively charged, so they move from lower to higher potential; the Assertion is true. A cell does maintain a potential difference; the Reason is true.

  2. However, the direction in which electrons move is explained by their negative charge, not by the cell. So R does not explain A. Option (B).

    1 mark

Answer: Option (B)

Where the marks are

  • Chooses (B) (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Electricity, one at a time, marked against the answer key and marking points.Back to the full paper2024 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.