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In Fig. , the magnetic needle has magnetic moment 6.7 × 10–2 Am2 and moment of inertia I = 7.5 × 10–6 kg m2 . It performs 10 complete oscillations in 6.70 s. What is the magnitude of the magnetic

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A short bar magnet placed with its axis at 30° with an external field of 800 G experiences a torque of 0.016 Nm.(i) What is the magnetic moment of the magnet?(ii) What is the work done in moving it from its most stable to most unstable position?(iii) The bar magnet is replaced by a solenoid of cross-sectional area 2 × 10–4 m2 and 1000 turns, but of the same magnetic moment. Determine the current flowing through the

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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What happens if a bar magnet is cut into two pieces: (a) transverse to its length, (b) along its

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A magnetised needle in a uniform magnetic field experiences a torque but no net force. An iron nail near a bar magnet, however, experiences a force of attraction in addition to a torque.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Must every magnetic configuration have a north pole and a south pole? What about the field due to a

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Two identical looking iron bars A and B are given, one of which is definitely known to be magnetised. (We do not know which one.) How would one ascertain whether or not both are magnetised? If only one is magnetised, how does one ascertain which one? [Use nothing else

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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A short bar magnet placed with its axis at 30° with an external field of 800 G experiences a torque of 0.016 Nm.What is the magnitude of the equatorial and axial fields due to a bar magnet of length 5.0 cm at a distance of 50 cm from its mid-point? The magnetic moment of the bar magnet is 0.40 A

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Fig. shows a small magnetised needle P placed at a point O. The arrow shows the direction of its magnetic moment. The other arrows show different positions (and orientations of the magnetic moment) of another identical magnetised needle Q. (i) In which configuration the system is not in equilibrium?(ii) In which configuration is the system in (i) stable, and (ii) unstable equilibrium?(iii) Which configuration corresponds to the lowest potential energy among all the configurations shown?

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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The diagrams given in Fig. show magnetic field lines (thick lines in the figure) wrongly. Point out what is wrong with them.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field lines show the direction (at every point) along which a small magnetised needle aligns (at the point). Do the magnetic field lines also represent the lines of force on a moving charged particle at every

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field lines can be entirely confined within the core of a toroid, but not within a straight solenoid.

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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If magnetic monopoles existed, how would the Gauss’s law of magnetism be

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Does a bar magnet exert a torque on itself due to its own field? Does one element of a current-carrying wire exert a force on another element of the same

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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Magnetic field arises due to charges in motion. Can a system have magnetic moments even though its net charge is

asked Mar 20, 2022 in 12th Physics by varun (6.7k points)

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