Physics
Assertion (A) : Magnetic field lines never intersect each other.
Reason (R) : At a particular point, magnetic field has only one direction.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Magnetism
5 Likes
Answer
both A and R are true and R is the correct explanation of A
Explanation
Assertion (A) is true because if magnetic field lines intersect each other then it would imply that there are two directions of the magnetic field at a single point, which is not possible.
Reason (R) is true because if magnetic field has more than one direction at any point, it would mean that if a compass needle is placed at that point in the magnetic field then north pole of its needle will point in multiple directions simultaneously which is not possible.
This is the correct reason why magnetic field lines do not intersect and hence, reason justifies the assertion.
Answered By
3 Likes
Related Questions
Explain the method of plotting magnetic field lines by using a small compass needle.
Assertion (A) : Two bar magnets attract when they are brought near to each other with the same pole.
Reason (R) : Unlike poles attract each other.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
Assertion (A) : Neutral points are the points at which two magnetic fields are equal in magnitude and in the same direction.
Reason (R) : The net magnetic field at a neutral point is zero.
- both A and R are true and R is the correct explanation of A
- both A and R are true and R is not the correct explanation of A
- assertion is false but reason is true
- assertion is true but reason is false
In a physics laboratory, a student places a bar magnet near a compass. At certain positions, the compass needle shows no deflection.
(a) Why does the compass needle show no deflection at certain points? What are these points called?
(b) What happens to the magnetic field lines at these points?
(c) Why are these points useful in studying magnetic fields?
(d) Are these points fixed, or do they change their positions?