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The magnetic field lines due to a bar magnet are correctly shown in,

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Important Questions on Magnetism

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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 76
An electron of charge e is moving in a circular orbit of radius r around a nucleus, at a frequency υ. The magnetic moment associated with the orbital motion of the electron is
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 86
A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment µ is given by
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 88
A charge q, mass m is moving in uniform circular motion under action of a magnetic field B. Find magnetic moment associated with the charge. Radius of circle is'R'.
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 92
Which of the following is experienced by a current carrying loop in a uniform magnetic field?
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 100
A current I flows in a circular coil of radius r. If the coil is placed in a uniform magnetic field B with its plane parallel to the field, the magnitude of the torque that acts on the coil is
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 109
A torque of 25 N m acts on a current carrying coil of area 5 m2 in a magnetic field of induction 2 Wb m-2. The angle between normal to coil and magnetic field is 30°. Then value of current is
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 131
A bar magnet has coercivity 4×103 A m-1. It is desired to demagnetise it by inserting it inside a solenoid 12 cm long and having 60 turns. The current that should be sent through the solenoid is
 
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Physics Crash Course MHT-CET>Chapter 17 - Magnetism>Exercise 1>Q 134
Magnetic susceptibility for a paramagnetic and diamagnetic materials is respectively