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Magnetic Field And Field Lines Video Lecture - Class 10

FAQs on Magnetic Field And Field Lines Video Lecture - Class 10

1. What is a magnetic field and how is it created?

Ans. A magnetic field is a region around a magnet or a current-carrying conductor where its magnetic influence can be felt. It is created by moving electric charges or by the presence of a permanent magnet. The field is represented by magnetic field lines that form closed loops and indicate the direction of the magnetic force.

2. How do magnetic field lines provide information about the magnetic field?

Ans. Magnetic field lines are imaginary lines that help visualize the strength and direction of a magnetic field. The density of field lines represents the strength of the magnetic field, with more lines indicating a stronger field. The direction of the field can be determined by the orientation of the lines, which always form closed loops from the north pole to the south pole of a magnet or in the direction of the magnetic force on a moving charge.

3. What happens to the magnetic field strength as you move away from a magnet?

Ans. The magnetic field strength decreases as you move away from a magnet. According to the inverse square law, the strength of the magnetic field is inversely proportional to the square of the distance from the magnet. This means that the field becomes weaker as the distance from the magnet increases.

4. How can we determine the direction of a magnetic field using a compass?

Ans. A compass needle aligns itself with the magnetic field lines. By observing the direction in which the compass needle points, we can determine the direction of the magnetic field. The north pole of the compass needle points towards the south pole of a magnet or in the direction opposite to the magnetic field lines.

5. Can magnetic field lines intersect each other?

Ans. No, magnetic field lines cannot intersect each other. If they were to intersect, it would imply that at the point of intersection, there are multiple directions for the magnetic field, which is not possible. The non-intersecting nature of magnetic field lines ensures that the magnetic field has a unique direction at any given point.

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Oct 20, 2025 Last updated

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