NEET
Physics
Magnetism and Matter
Previous Years Questions

A big circular coil of 1000 turns and average radius 10 m is rotating about its horizontal diameter at 2 rad s$$-$$1. If the vertical component of ear...
A thick current carrying cable of radius 'R' carries current 'I' uniformly distributed across its cross section. The variation of magnetic field B(r) ...
In the product$$\overrightarrow F = q\left( {\overrightarrow v \times \overrightarrow B } \right)$$$$= q\overrightarrow v \times \left( {B\widehat... A uniform conducting wire of length 12a and resistance 'R' is wound up as a current carrying coil in the shape of ,(i) an equilateral tringle of side ... An iron rod of susceptibility 599 is subjected to a magnetizing field of 1200 A m-1. The permeability of the material of the rod is :$$\left( {{\mu _0...
At a point A on the earth’s surface the angle of dip, $$\delta$$ = + 25o. At a point B on the earth's surface the angle of dip, $$\delta$$ = – 25o. ...
A thin diamagnetic rod is placed vertically between the poles of an electromagnet. When the current in the electromagnet is switched on, then the diam...
If $$\theta$$1 and $$\theta$$2 be the apparent angles of dip observed in two vertical planes at right angles to each other, then the true angle of d...
A 250-turn rectangular coil of length 2.1 cm and width 1.25 cm carries a current of 85 $$\mu$$A and subjected to a magnetic field of strength 0.85 T....
A bar magnet is hung by a thin cotton thread in a uniform horizontal magnetic field and is in equilibrium state. The energy required to rotate it by 6...
The magnetic susceptibility is negative for
A rectangular coil of length 0.12 m and width 0.1 m having 50 turns of wire is suspended vertically in a uniform magnetic field of strength 0.2 weber/...
Following figures show the arrangement of bar magnets in different configurations. Each magnet has magnetic dipole moment $$\overrightarrow m .$$ Whic...
A bar magnet of magnetic moment M is placed at right angles to a magnetic induction B. If a force F is experienced by each pole of the magnet, the len...
A current loop in a magnetic field
A bar magnet of length $$'l'$$ and magnetic dipole moment 'M' is bent in the form of an arc as shown in figure. The new magnetic dipole moment will be...
A magnetic needle suspended parallel to a magnetic field requires $$\sqrt 3 J$$ of work to turn it through 60o. The torque needed to maintain the need...
A compass needle which is allowed to move in a horizontal plane is taken to a geomagnetic pole. It
A short bar magnet of magnetic moment 0.4 J T$$-$$1 is placed in a uniform magnetic field of 0.16 T. The magnet is in stable equilibrium when the pote...
There are four light-weight-rod samples A, B, C, D separately suspended by threads. A bar magnet is slowly brought near each sample and the following ...
The magnetic moment of a diamagnetic action is
Two identical bar magnets are fixed with their centers at a distance d apart. A stationary charge Q is placed at P in between the gap of the two magne...
Electromagnets are made of soft iron because soft iron has
A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 sec in earth's ...
If a diamagnetic substance is brought near the north or the south pole of a bar magnet, it is
A bar magnet having a magnetic moment of 2 $$\times$$ 104 J T$$-$$1 is free to rotate in a horizontal plane. A horizontal magnetic field B = 6 $$\t... Curie temperature above which Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment$$\mu $$is given by Curie temperature above which A coil in the shape of an equilateral triangle of side$$l$$is suspended between the pole pieces of a permanent magnet such that$$\overrightarrow B ...
If the magnetic dipole moment of an atom of diamagnetic material, paramagnetic material and ferromagnetic material are denoted by $$\mu$$d, $$\mu$$p...
A diamagnetic material in a magnetic field moves
According to Curie's law, the magnetic susceptibility of a substance at an absolute temperature $$T$$ is proportional to
A bar magnet is oscillating in the Earth's magnetic field with a period T. What happens to its period and motion if its mass is quadrupled?
Two bar magnets having same geometry with magnetic moments M and 2M, are firstly placed in such a way that their similar poles are same side then its ...
Among which the magnetic susceptibility does not depened on the temperature ?
Tangent galvanometer is used to measure
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