Q15
1 markMCQSection A

A uniform magnetic field exists in the plane of paper as shown in the diagram. In this field, an electron (e⁻) and a positron (p⁺) enter as shown. The electron and positron experience forces :

Figure for question 15
Chemical Reactions and Equations
Chemical Reactions

Options

(A)both pointing into the plane of the paper.
(B)both pointing out of the plane of the paper.
(C)pointing into the plane of the paper and out of the plane of the paper respectively.
(D)pointing out of the plane of the paper and into the plane of the paper respectively.
Official Answer

The electron and positron experience forces pointing into the plane of the paper and out of the plane of the paper respectively.

magnetic fieldelectronpositronforceright-hand rule

Marking Scheme

  • 11 mark for correct answer

Hint

Use the right-hand rule to determine the direction of the force on the electron and positron.

Quick Oral Answer

The electron and positron experience forces pointing into the plane of the paper and out of the plane of the paper respectively, due to the uniform magnetic field existing in the plane of the paper.

Analysis & Explanation

This question requires the application of the right-hand rule to determine the direction of the force on charged particles in a magnetic field. The correct answer is option C, which states that the electron and positron experience forces pointing into the plane of the paper and out of the plane of the paper respectively.

Common Mistakes

  1. 1Confusing the direction of the force on the electron and positron
  2. 2Not using the right-hand rule correctly

Interesting Facts

The right-hand rule is a useful tool for determining the direction of the force on charged particles in a magnetic field.

The magnetic field is uniform and exists in the plane of the paper, which means that the force on the electron and positron will be perpendicular to the plane of the paper.

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Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2024?

This question carries 1 mark in the CBSE Class 10 Science 2024 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Chemical Reactions and Equations" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Chemical Reactions" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2024 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2024 paper.