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If the solenoid in Exercise 5 is free to turn about the vertical direction and a uniform horizontal magnetic field of 0.25 T is applied, what is the magnitude of torque on the solenoid when its axis makes an angle of 30° with the direction of applied

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

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A bar magnet of magnetic moment 1.5 J T –1 lies aligned with the direction of a uniform magnetic field of 0.22 T.(i) What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (a) normal to the field direction, (b) opposite to the field direction?(ii) What is the torque on the magnet in cases (a) and

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

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A closely wound solenoid of 2000 turns and area of cross-section 1.6 × 10 –4 m2 , carrying a current of 4.0 A, is suspended through its centre allowing it to turn in a horizontal plane.(i) What is the magnetic moment associated with the solenoid?(ii) What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10–2 T is set up at an angle of 30° with the axis of the

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

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A circular coil of 16 turns and radius 10 cm carrying a current of 0.75 A rests with its plane normal to an external field of magnitude 5.0 × 10–2 T. The coil is free to turn about an axis in its plane perpendicular to the field direction. When the coil is turned slightly and released, it oscillates about its stable equilibrium with a frequency of 2.0 s–1. What is the moment of inertia of the coil about its axis of

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

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A magnetic needle free to rotate in a vertical plane parallel to the magnetic meridian has its north tip pointing down at 22° with the horizontal. The horizontal component of the earth’s magnetic field at the place is known to be 0.35 G. Determine the magnitude of the earth’s magnetic field at the

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

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At a certain location in Africa, a compass points 12° west of the geographic north. The north tip of the magnetic needle of a dip circle placed in the plane of magnetic meridian points 60° above the horizontal. The horizontal component of the earth’s field is measured to be 0.16 G. Specify the direction and magnitude of the earth’s field at the

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

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A short bar magnet has a magnetic moment of 0.48 J T –1. Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on the

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

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A short bar magnet has a magnetic moment of 0.48 J T –1. Give the direction and magnitude of the magnetic field produced by the magnet at a distance of 10 cm from the centre of the magnet on the equatorial lines (normal bisector) of the

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

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A short bar magnet placed in a horizontal plane has its axis aligned along the magnetic north-south direction. Null points are found on the axis of the magnet at 14 cm from the centre of the magnet. The earth’s magnetic field at the place is 0.36 G and the angle of dip is zero. What is the total magnetic field on the normal bisector of the magnet at the same distance as the null–point (i.e., 14 cm) from the centre of the magnet? (At null points, field due to a magnet is equal and opposite to the horizontal component of

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

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If the bar magnet in exercise 13 is turned around by 180°, where will the new null points be

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

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A short bar magnet of magnetic movement 5.25 × 10–2 J T –1 is placed with its axis perpendicular to the earth’s field direction. At what distance from the centre of the magnet, the resultant field is inclined at 45° with earth’s field on(i) its normal bisector (ii) its axis. Magnitude of the earth’s field at the place is given to be 0.42 G. Ignore the length of the magnet in comparison to the distances

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

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Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when

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Why is diamagnetism, in contrast, almost independent of

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If a toroid uses bismuth for its core, will the field in the core be (slightly) greater or (slightly) less than when the core is

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

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Is the permeability of a ferromagnetic material independent of the magnetic field? If not, is it more for lower or higher

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

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Magnetic field lines are always nearly normal to the surface of a ferromagnet at every point. (This fact is analogous to the static electric field lines being normal to the surface of a conductor at every point.)

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

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Would the maximum possible magnetisation of a paramagnetic sample be of the same order of magnitude as the magnetisation of a

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

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Explain: Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a

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Explain: The hysteresis loop of a soft iron piece has a much smaller area than that of a carbon steel piece. If the material is to go through repeated cycles of magnetisation, which piece will dissipate greater heat

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

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Explain: ‘A system displaying a hysteresis loop such as a ferromagnet, is a device for storing memory?’ Explain the meaning of this

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

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