EASY
NDA & NA EE
IMPORTANT
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The ratio of the magnetic field at the centre of a current-carrying circular coil to magnetic moment is . If the current and the radius both are doubled. The new ratio will become
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Important Questions on Magnetic Effect of Current and Magnetism
EASY
NDA & NA EE
IMPORTANT
The ratio of torque acting on a magnet of magnetic moment placed in a uniform magnetic field when the angle between and are and respectively is
EASY
NDA & NA EE
IMPORTANT
A bar magnet of the magnetic moment is placed in a uniform magnetic field , in the direction perpendicular to the field (i.e., an axis of the magnet makes an angle of with the field). What is the potential energy of the bar magnet?
EASY
NDA & NA EE
IMPORTANT
A magnetic dipole in a uniform magnetic field has: (Take zero potential energy when magnetic dipole is perpendicular to magnetic field)
EASY
NDA & NA EE
IMPORTANT
A bar magnet of magnetic moment is placed in a uniform magnetic induction If each pole of a magnet experiences a force of then the magnetic length of the magnet is
EASY
NDA & NA EE
IMPORTANT
A magnetic dipole of moment is placed in the magnetic field . It is free to rotate about an axis about which its moment of inertia is . It is displaced by a small angle at time and released. The dipole undergoes simple harmonic motion with angular frequency . Its potential energy at time is : (Assume if )
