Q19
1 markMCQSection A

Assertion (A) : No two magnetic field lines are found to cross each other. Reason (R) : The compass needle cannot point towards two directions at the point of intersection of two magnetic field lines.

Magnetic Effects of Electric Current
Magnetic Field Lines

Options

(A)Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).
(B)Both Assertion (A) and Reason (R) are true, but Reason (R) is not the correct explanation of Assertion (A).
(C)Assertion (A) is true, but Reason (R) is false.
(D)Assertion (A) is false, but Reason (R) is true.
Official Answer

Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of Assertion (A).

magnetic field linescompass needleintersection

Marking Scheme

  • 11 mark

Hint

Recall the properties of magnetic field lines and the behavior of compass needles in a magnetic field.

Quick Oral Answer

No two magnetic field lines are found to cross each other because the compass needle cannot point towards two directions at the point of intersection of two magnetic field lines.

Analysis & Explanation

The assertion states that no two magnetic field lines are found to cross each other. This is a fundamental property of magnetic field lines. The reason explains that if two magnetic field lines were to cross each other, the compass needle would point towards two directions at the point of intersection, which is not possible. Therefore, both the assertion and reason are true, and the reason is the correct explanation of the assertion.

Common Mistakes

  1. 1thinking that magnetic field lines can cross each other
  2. 2not understanding the behavior of compass needles in a magnetic field

Interesting Facts

Magnetic field lines are used to visualize the magnetic field around a magnet or a current-carrying conductor.

The direction of the magnetic field is indicated by the direction of the compass needle.

Spotted a mistake or something unclear?

Tell us — we fix reported answers fast.

Frequently Asked Questions

How many marks does this question carry in CBSE Class 10 Science 2025?

This question carries 1 mark in the CBSE Class 10 Science 2025 examination.

Which chapter does this question come from in Science?

This question is from the chapter "Magnetic Effects of Electric Current" in the CBSE Class 10 Science syllabus.

What topic does this question cover in Science?

This question covers the topic "Magnetic Field Lines" from CBSE Class 10 Science.

What type of question is this in the CBSE Class 10 Science 2025 paper?

This is a MCQ question from Section A in the CBSE Class 10 Science 2025 paper.