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Sahay Sir > Question Answers > Uncategorised (JEE Advanced Physics by BM Sharma + GMP Solutions) > A small magnet of magnetic moment M is placed at broad side on position of a magnet of magnetic M’, length 2l’ in such a way that the axis of former coincides with the perpendicular bisector of the latter. The separation between their centres is d. Calculate the nature of interaction (force or couple ) among them. What is its limiting value, when d becomes very large ?

A small magnet of magnetic moment M is placed at broad side on position of a magnet of magnetic M’, length 2l’ in such a way that the axis of former coincides with the perpendicular bisector of the latter. The separation between their centres is d. Calculate the nature of interaction (force or couple ) among them. What is its limiting value, when d becomes very large ?

A closely wound solenoid of 1000 turns and area of cross-section 2.0×10^−4 m^2 A small magnet of magnetic moment M is placed at broad side on position of a magnet of magnetic M' as shown in Fig. (a) What is the torque experienced by the solenoid due to the field ? (b) If the solenoid is free to turn about the verticle direction carrying a current of 2.0 A. It is placed with its horizontal axis at 30∘ with the direction of a uniform horizontal magnetic field of 0.16 T specify its orientations of stabvle and unstable equilibriums. What is the amount of work needed to displace the solenoid from its stable orientation to its unstable orientations ?