Book Store

Download books and chapters from book store.
Currently only available for.
CBSE

Subject

Physics

NEET Physics : Magnetism and Matter

Multiple Choice Questions

51.

Iron is ferromagnetic

at all temperatures
at NTP only
above 770°C
below 770°C

52.

Relative permeability of iron is 5500, then its magnetic susceptibility will be

5500 × 10⁷
5500 × 10^-7
5501
5499

53.

In the unmagnetized state magnetic domains of a magnetic substance are oriented at

60°
90°
randomly
150°

54.

When a ferromagnetic material is heated above its Curie temperature it

gets demagnetised
becomes diamagnetic
behaves like a paramagnetic substance
remains unaffected

55.

A hydrogen atom is paramagnetic. A hydrogen molecule is

diamagnetic
paramagnetic
ferromagnetic
none of these

56.

A bar magnet of magnetic moment $\vec{M}$ is placed in the magnetic field $\vec{B}$ . The Torque acting on the magnet is :

$\vec{M} \times \vec{B}$
$\vec{M} - \vec{B}$
$\frac{1}{2} \vec{M} \times \vec{B}$
$\vec{M} + \vec{B}$

57.

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
$\sqrt{2} H$

58.

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

59.

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

60.

Which one of the following is ferromagnetic?

Gold
Wood
Manganese
Nickle

Do a good deed today
Refer a friend to Zigya