Magnetism and M...

At two places A and B using vibration magnetometer, a magnet vibrates in a horizontal plane and its respecitve periodic time are 2 sec and 3 sec and at these places the earth\'s horizontal components are H_A and H_B respectively. Then the ratio between H_A and H_B will be

The time period of a bar magnet suspended horizontally in the earth\'s magnetic field and allowed to oscillate

A small bar magnet A oscillates in a horizontal plane with a period T at a place where the angle of dip is 60°. When the same needle is made to oscillate in a vertical plane coinciding with the magnetic meridian, its period will be

Vibration magnetometer works on the principle of

Tangent galvanometer is used to measure

A tangent galvanometer has a coil with 50 turns and radius equal to 4 cm. A current of 0.1 A is passing through it. The plane of the coil is set parallel to the earth\'s magnetic meridian. If the value of the earth\'s horizontal component of the magnetic field is 7 × 10^–5 tesla and µ₀ = 4π × 10^–7 weber/amp × m, then the deflection in the galvanometer needle will be

A thin rectangular magnet suspended freely has a period of oscillation equal to T. Now it is broken into two equal halves (each having half of the original length) and one piece is made to oscillate freely in the same field. If its period of oscillation is T’, then ratio T’ /T is

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 500°C, then

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