NCERT Conceptual questions based on magnetic moment of dipole and magnetic field|#shorts#short

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Издатель May 5, 2023

NCERT Conceptual questions based on magnetic moment of dipole and magnetic field|NEET physics

Field lines of Bar magnet and calculation of magnetic field in axial position of bar magnet|ncert

@neetphysics1

In this video you myself explain the solved examples of chapter 05 ncert physics magnetism and matters question no 5.1,5.2,5.3,5.4,5.5 . These questions in which question from 5.3 to 5.5 very conceptual questions. explained all questions in satisfactory ways. hope you people happy after seeing this lecture and clearing all doubts .
your queries:-
NCERT EXAMPLES:-
Example 5.3
(a) What happens if a bar magnet is cut into two pieces: (i) transverse
to its length, (ii) along its length?
(b) A magnetised needle in a uniform magnetic field experiences a
torque but no net force. An iron nail near a bar magnet, however,
experiences a force of attraction in addition to a torque. Why?
(c) Must every magnetic configuration have a north pole and a south
pole? What about the field due to a toroid?
(d) Two identical looking iron bars A and B are given, one of which is
definitely known to be magnetised. (We do not know which one.)
How would one ascertain whether or not both are magnetised? If
only one is magnetised, how does one ascertain which one? [Use
nothing else but the bars A and B.]

Example 5.4 What is the magnitude of the equatorial and axial fields
due to a bar magnet of length 5.0 cm at a distance of 50 cm from its
mid-point? The magnetic moment of the bar magnet is 0.40 A m2
,the
same as in Example 5.2

Example 5.5 Figure 5.5 shows a small magnetised needle P placed at
a point O. The arrow shows the direction of its magnetic moment. The
other arrows show different positions (and orientations of the magnetic
moment) of another identical magnetised needle Q.
(a) In which configuration the system is not in equilibrium?
(b) In which configuration is the system in (i)stable, and (ii) unstable
equilibrium?
(c) Which configuration corresponds to the lowest potential energy
among all the configurations shown?

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