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प्रश्न
Three identical bar magnets are rivetted together at centre in the same plane as shown in figure. This system is placed at rest in a slowly varying magnetic field. It is found that the system of magnets does not show any motion. The north-south poles of one magnet is shown in the figure. Determine the poles of the remaining two.
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उत्तर
If the net force on the system is zero and net torque on the system is also zero, then the system will be in stable equilibrium. This is possible only when the poles of the remaining two magnets are as shown below.
The north pole of magnet (1) is equally attracted by south poles of (2) and (3) magnets placed at equal distance.
Similarly, one pole of any one magnet is attracted by opposite poles of other two magnets so resultant force or moment of each magnet is zero and will not be in motion placed on table.
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संबंधित प्रश्न
Consider a magnetic dipole kept in the north to south direction. Let P1, P2, Q1, Q2 be four points at the same distance from the dipole towards north, south, east and west of the dipole respectively. The directions of the magnetic field due to the dipole are the same at
(a) P1 and P2
(b) Q1 and Q2
(c) P1 and Q1
(d) P2 and Q2
Pick the correct options.
(a) All electrons have magnetic moment.
(b) All protons have magnetic moment.
(c) All nuclei have magnetic moment.
(d) All atoms have magnetic moment.
The primary origin(s) of magnetism lies in ______.
- atomic currents.
- pauli exclusion principle.
- polar nature of molecules.
- intrinsic spin of electron.
What is a magnet?
Which is a common permanent magnet?
Which end of a freely suspended magnet is the north-seeking pole (N-pole)?
Which end of a freely suspended magnet is the south-seeking pole (S-pole)?
What happens when like magnetic poles are brought together?
In which direction do magnetic field lines travel inside a bar magnet?
What does it mean when magnetic field lines are closer together?
What does cutting an ordinary magnet show about its poles?
What is a compass needle?
Why was a compass useful to sailors, travellers, and surveyors for navigation before GPS?
Who gave a scientific explanation in 1600 for the north–south alignment of a freely suspended magnet?
How does the region near the geographic North Pole behave in the simple Earth-magnet model?
How does the region near the geographic South Pole behave in the simple Earth-magnet model?
What natural magnetic material was known to ancient peoples?
Who systematically investigated magnetism and proposed that Earth behaves like a magnet?
