Which one of the following is ferromagnetic? from Physics Magnet

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

91.

When a ferromagnetic material is heated above its Curie temperature it

  • gets demagnetised

  • becomes diamagnetic

  • behaves like a paramagnetic substance

  • remains unaffected


92.

A hydrogen atom is paramagnetic. A hydrogen molecule is

  • diamagnetic

  • paramagnetic

  • ferromagnetic

  • none of these


93.

A bar magnet of magnetic moment M is placed in the magnetic field B. The Torque acting on the magnet is :

  • M × B

  • M - B

  • 12M × B

  • M + B


94.

At a certain place, magnitude of horizontal and vertical components of a magnetic field are same. The total intensity of magnetic field at that place will be

  • H

  • H2

  • 2H

  • 2  H


Advertisement
95.

The magnetic lines of force inside a bar magnet

  • are from north-pole to south-pole of the magnet

  • do not exist

  • depend upon the area of cross-section of the bar magnet

  • are from south-pole to north-pole of the magnet


96.

Curie temperature is the temperature above which

  • a ferromagnetic material becomes paramagnetic

  • a paramagnetic material becomes diamagnetic

  • a ferromagnetic material becomes diamagnetic

  • a paramagnetic material becomes ferromagnetic


Advertisement

97.

Which one of the following is ferromagnetic?

  • Gold

  • Wood

  • Manganese

  • Nickle


D.

Nickle

Ferromagnetic substances are those, when placed in magnetic field, acquire a strong magnetism in the direction of field Nickle shows this property.


Advertisement
98.

If the earth field induction at a place is 0.36 gauss and the angle of dip is 60°, the horizontal and vertical components of the field will be respectively

  • 0.18 gauss, 0.18 3 gauss

  • 0.98 gauss, 0.9 2 gauss

  • 1.08 gauss, and 1.08 3 gauss

  • 1.07 gauss, 0.11 2 gauss


Advertisement
99.

Magnetic field intensify at the centre of coil of 50 turns, 0.5 m radius and carrying a current of 2A, is

  • 5x 10-5 T

  • 3 x 10-5 T

  • 1.25 × 10-4 T

  • 0.5 x 10-5 T


100.

A straight conductor of length 0.4 m is moved with a speed of 7 m/s perpendicular to the magnetic field of intensity of 0.9 Wb/m2. The induced emf across the conductor will be

  • 7.25 V

  • 5.54 V

  • 1.25 V

  • 2.52 V


Advertisement