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Assertion (A): An… (Class 12 Physics SQP 2023-24, Q15)

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PhysicsCBSE Class 12 · Sample paper, session 2023-24 · 1 mark · Assertion-reason

CBSE Class 12 Physics sample paper 2023-24: question 15

From the official CBSE sample question paper for 2023-24, section A, question 15, for 1 mark. Try it first; the hints and our step-by-step solution are below.

Q15 · 1 mark · Assertion-reasonCompetency-basedElectrostatic Potential and Capacitance

Assertion (A): An electron has a higher potential energy when it is at a location associated with a negative value of potential and has a lower potential energy when at a location associated with a positive potential.
Reason (R): Electrons move from a region of higher potential to a region of lower potential.

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

Source: official sample paper from cbseacademic.nic.in (PDF). See it in the full Sample paper 2023-24.

Hints

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

Hint 1

Write potential energy as qV for an electron.

Hint 2

Which way does a negative charge naturally move in potential?

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. : negative V gives positive (higher) U and positive V gives lower U, so A is true.

    ½ mark

  2. Electrons, being negative, move from lower to higher potential, so R is false.

    ½ mark

Answer: Option (C)

Where the marks are

  • A true via , R false (1 mark)

Revise the chapter

Practise this chapterBoard-style questions from Electrostatic Potential and Capacitance, one at a time, marked against the answer key and marking points.Back to the full paperSample paper 2023-24: 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.