Why can't two magnetic field lines intersect?

The magnetic field lines do not intersect (or cross) one another. This is due to the fact that the resultant force on a North pole at any point can be only in one direction. But if the two magnetic field lines intersect one another, then the resultant force on a North pole placed at the point of intersection will be along two directions, which is not possible. In other words, no two field-lines are found to cross each other. If they did, it would mean that at the point of intersection, the compass needle would point towards two directions, which is not possible.

E M B I B E

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 1

MEDIUM

10th CBSE

IMPORTANT

Earn 100

An electron, moving from south to north in the plane of the page in a region where there is a uniform magnetic field, experiences a force that is directed from west to east in the plane of the page itself. What is the direction of this uniform magnetic field?

Important Questions on Magnetic Effects of Electric Current

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10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

AB is a current-carrying conductor in the plane of the paper as shown in the figure. What are the directions of the magnetic field produced at points P and Given

r_{1} > r_{2}

, where will the strength of the magnetic field be larger?
Question Image

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10th CBSE

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SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

What steps are taken to increase the efficiency of commercial motors?

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10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

What is a solenoid? Draw magnetic lines of force which are produced around a solenoid on passing an electric current through it.

EASY

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

Define electromagnetic induction. Give an example of a device based on electromagnetic induction.

HARD

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

Who discovered the phenomenon of production of the magnetic field around a current-carrying wire? Draw the experimental setup used by him and describe the experiment briefly.

MEDIUM

10th CBSE

IMPORTANT

SCIENCE PHYSICS>Chapter 4 - Magnetic Effects of Electric Current>EXERCISES>Q 2

A fuse wire has a rating