Magnetism and M...

The variation of magnetic susceptibility (χ) with absolute temperature T for a ferromagnetic is given in Fig. by

Which of the following has low value for ferrite?

A magnetizing field of 2×10³ amp/m produces a magnetic flux density of 8π tesla in an iron rod. The relative permeability of the rod will be

A magnetic needle suspended by a silk thread is vibrating in the earth’s magnetic field. If the temperature of the needle is increased by 700ºC, then

At the magnetic north pole of the earth, the value of the horizontal component of earth’s magnetic field and angle of dip are respectively

Two identical magnetic dipoles of magnetic moments 1.0 A-m² each, placed at a separation of 2 m with their axes perpendicular to eachother. The resultant magnetic field at a point midway between the dipole is

Using a bar magnet P, a vibration magnetometer has time period 2 seconds. When a bar Q (identical to P in mass and size) is placed on top of P, the time period is unchanged. Which of the following statements is true?

A certain amount of current when flowing in a properly set tangent galvanometer produces a deflection of 45^o. If the current be reduced by a factor of √3, the deflection would

The magnetic field due to a small magnetic dipole of magnetic moment M, at distance r from the centre on equatorial line is given by

A bar magnet, of magnetic moment M, is placed in a magnetic field of induction B. The torque exerted on it is