Prepare for NEET Physics Magnetic Effects of Current and Magnetism (Field Of A Bar Magnet) with MCQs & PYQs on NEET.GUIDE. Access free practice, previous year questions, and expert solutions to map the magnetic field lines of bar magnets.
NEET Questions / Physics / Magnetic Effects of Current and Magnetism / Field Of A Bar Magnet
Two identical short bar magnets, each of magnetic moment , are placed perpendicular to each other at a distance apart. The magnetic field at a point midway between them on the line joining their centers is:
\frac{\sqrt{5} \mu_0 M}{2\pi d^3}
\frac{2\sqrt{5} \mu_0 M}{\pi d^3}
\frac{2 \mu_0 M}{\sqrt{5}\pi d^3}
\frac{4\sqrt{5} \mu_0 M}{\pi d^3}
A bar magnet is cut into two equal pieces along its length. The magnetic moment of each piece becomes:
A bar magnet of magnetic moment is bent into a semicircle. The new magnetic moment is:
A magnetic dipole of moment is aligned at an angle with a uniform magnetic field . The work done in rotating it by an angle is:
MBcosθ dθ
MBsinθ dθ
-MBcosθ dθ
-MBsinθ dθ
A short bar magnet placed with its axis at 30° with an external field of 800 G experiences a torque of 0.016 Nm. The magnetic moment of the magnet is:
0.2 Am²
0.4 Am²
0.6 Am²
0.8 Am²
The magnetic field lines due to a bar magnet:
Form closed loops.
Originate at the south pole and terminate at the north pole.
Originate at the north pole and terminate at the south pole outside the magnet.
Are parallel to the axis of the magnet.
A small compass is placed near the north pole of a bar magnet. In which direction will the north pole of the compass point?
Towards the north pole of the magnet
Away from the north pole of the magnet
Perpendicular to the axis of the magnet
The compass will not be affected
The magnetic field is strongest at which point of a bar magnet?
Center
Poles
Midway between the center and either pole
The field strength is uniform everywhere
Inside a bar magnet, the magnetic field lines travel from:
North pole to south pole
South pole to north pole
East to west
West to east
