Q: Match List-I with List-II. array ll|rl & List-I & & array l List-II \\ (Susceptibility ( )) array \\ A. & Diamagnetic & I. & =0 \\ B. & Ferromagnetic & II. & 0 -1 \\ C. & Paramagnetic & III. & 1 \\ D.

array l|rl (Material) & & (Susceptibility ( )) \\ Diamagnetic & (II) & 0 -1 \\ Ferromagnetic & (III) & 1 \\ Paramagnetic & (IV) & 0 \\ Non-magnetic & (I) & =0 array

Question 1

If the ratio of relative permeability and relative permittivity of a uniform medium is 1: 4. The ratio of the magnitudes of electric field intensity (E) to the magnetic field intensity (H) of an EM wa

Accepted Answer

_r E_r = 1 4 E H = E B =v = 1 = = _0 _r _0 _r = _0 _0 _r _r =120 ( 1 2 ) = 60 1

Question 2

The incorrect relation for a diamagnetic material (all the symbols carry their usual meaning and is a small positive number) is

Accepted Answer

For diamagnetic material, 0 _r 1 = _r-1 -1 0 _r= _0 _0 ( _r 1 )

Question 3

A sheet is placed on a horizontal surface in front of a strong magnetic pole. A force is needed to: A. hold the sheet there if it is magnetic. B. hold the sheet there if it is non-magnetic. C. move th

Accepted Answer

A. A magnetic pole will repel or attract magnetic sheet so force is need. B. If sheet is non-magnetic, no force needed. C. If it is conducting, then there will be addy current in sheet, which opposes the motion. So forces is needed move sheet with uniform speed. D. The non-conducting and non-polar sheet do not interact with magnetic field of magnet.

Question 4

The magnetic moment of an iron bar is M. It is now bent in such a way that it forms an arc section of a circle subtending an angle of 60^ at the centre. The magnetic moment of this arc section is

Accepted Answer

M=m L R =L R 3 =L R= 3 L M^ =m(2 R) 30^ =m(2) 3 L 1 2 = 3 m L= 3 M

Question 5

Match List-I with List-II. array ll|rl & List-I & & array l List-II \ (Susceptibility ( )) array \ A. & Diamagnetic & I. & =0 \ B. & Ferromagnetic & II. & 0 -1 \ C. & Paramagnetic & III. & 1 \ D.

Accepted Answer

array l|rl (Material) & & (Susceptibility ( )) \ Diamagnetic & (II) & 0 -1 \ Ferromagnetic & (III) & 1 \ Paramagnetic & (IV) & 0 \ Non-magnetic & (I) & =0 array

Question 6

The magnetic moment and moment of inertia of a magnetic needle as shown are, respectively, 1.0 10^ -2 ~A ~m and 10^ -6 ^2 ~kg ~m ^2. If it completes 10 oscillations in 10 s , the magnitude of the magn

Accepted Answer

Time period of oscillation of magnet inside the magnetic field T=2 1 M B T= t n = 10 10 =1 ~s 1=2 10^ -6 ^2 1.0 10^ -2 B 1 4 = 10^ -4 B B=0.4 mT

Magnetic Properties of Matter — Previous Year Questions & Solutions