NEET Physics / AI question bank / NCERT Class 12 / Magnetic Effects of Current and Magnetism
Magnetism and Matter: NEET questions with solutions
NEET tests a bar magnet as a magnetic dipole (torque, potential energy, work to turn it, axial and equatorial fields), Gauss's law for magnetism, the relations B = μ₀(H + M) and M = χH, and the classification of dia-, para- and ferromagnetic materials with examples. Marks are lost on the angle and sign in −mB cos θ, on the direction of the equatorial field, and on mixing up χ with μᵣ.
Also called: magnetism · bar magnet · magnetic materials
Questions
10 questions / answers after you pick
- Q1A bar magnet of magnetic moment 2.5 A m² is held with its axis at 30° to a uniform magnetic field of 0.040 T. What is the torque on it?
Dipole in a uniform fieldEasySingle correct
- Q2A short bar magnet has magnetic moment 0.50 A m². What is the magnetic field due to it at a point on its equatorial line 10 cm from its…
The electrostatic analogMediumSingle correct
- Q3Which one of the following substances is diamagnetic?
DiamagnetismEasySingle correct
- Q4A long solenoid with 500 turns per metre carries a current of 1.5 A. Its core is filled with a ferromagnetic material of relative…
Magnetisation and magnetic intensityMediumSingle correct
- Q5Samples of a paramagnet, a diamagnet, a superconductor and a ferromagnet are studied in a lab. Which of the following observations about…
ParamagnetismMediumStatement based
- Q6Read the Assertion (A) and Reason (R) about the magnetic field lines of a bar magnet and choose the correct option.
Gauss's law for magnetismMediumAssertion–Reason
- Q7A uniformly magnetised bar magnet has magnetic moment m. It is cut into four identical pieces by one cut along its length (along the axis)…
Magnetisation and magnetic intensityHardSingle correct
- Q8The magnetic field of a short bar magnet at a point on its axis, at distance r from its centre, has the same magnitude as its field at a…
The electrostatic analogHardSingle correct
- Q9A closed spherical surface is drawn so that it encloses only the N-pole end of a long bar magnet; the rest of the magnet passes out through…
Gauss's law for magnetismMediumSingle correct
- Q10Match each material in List I with the description of its magnetic susceptibility χ in List II.
FerromagnetismEasyMatch the following
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