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What is the total dipole moment of the sample for a magnetic field of 0.98 T and a temperature of 2.8 K? (Assume Curie's law)
If the dipole comes to stable equilibrium at an angle of 15º with this field, what is the magnitude of the other field?
Determine the horizontal component of the earth's magnetic field at the location.
Explain qualitatively on the basis of domain picture the irreversibility in the magnetisation curve of a ferromagnet.
Why does a paramagnetic sample display greater magnetisation (for the same magnetising field) when cooled?
A short bar magnet of magnetic moment 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
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 (a) the
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 location.
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 place.
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 rotation?
What is the force and torque on the solenoid if a uniform horizontal magnetic field of 7.5 × 10-2T is set up at an angle of 30º with the axis of the solenoid?
What is the amount of work required by an external torque to turn the magnet so as to align its magnetic moment: (i) normal to the field direction, (ii) opposite to the field direction?
If the solenoid in Exercise 5.5 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 ax
After reaching the bottom of the slope, the block continues to slide on the level ground for 30.0 m before stopping, what is the kinetic coefficient of friction between the level ground and the bloc
Find the force required to give a helicopter of mass M an acceleration of 0.25g upward. What would be the apparent weight in newtons of a passenger of the helicopter while it is accelerating upward?
Calculate the thrust in newtons that is needed for curiosity to land on the martian surface at 1.7 mi/h. The acceleration due to the gravity on mars is 3.76 m/s^2.
A closely wound solenoid of 800 turns and area of cross section 2.5 × 10-4 m2 carries a current of 3.0 A. Explain the sense in which the solenoid acts like a bar magnet. What is its associated
If the bar is free to rotate in the plane of the field, which orientation would correspond to its (a) stable, and (b) unstable equilibrium? What is the potential energy of the magnet in each case?
Consider a tank containing 40.0 kg of water. Neglecting the heat capacity of the tank, how much heat (in joules) would be required to raise the water temperature of from 1 to 94 degrees Celsius?
A short bar magnet placed with its axis at 30º with a uniform external magnetic field of 0.25 T experiences a torque of magnitude equal to 4.5 × 10-2 J. What is the magnitude of magnetic
What is the power radiated (in watts) by the sphere? For simplicity, assume the sphere and the vessel are both ideal blackbody radiators, with emissivity e = 1.
What value of current (with appropriate sense of circulation) in the windings of the solenoid can support the weight of the wire? g = 9.8 m s-2
Would doubling the angular acceleration during the given period have doubled final angular speed?