12th Class Physics MCQS Chapter 6

Coercive force is used to

Extend it

Magnetize the material

None of these

Demagnetize the material

The ratio of applies  stress to volumetric strain is called:

Tensile modulus

Shear modulus

Bulk modulus

Young modulus

Recently superconductor discovered is at temperature.

119K

16.3K

143K

110K

Curie temperature is a point where :

Paramagnetism changes to Ferromagnetism

Ferromagnetism changes to paramagnetism

Diamagnetism changes to paramagnetism

Paramagnetism changes to Diamagnetism

The dimension of stress is

[ML^-1T^-1]

[MLT^-1]

[ML^-1T]

[ML^-1T^-2]

Energy band theory is based upon

Bohr’s atomic Model

Wave mechanical model

Hund’s Rule

Heisenberg uncertainty principle

A cable breaks if stretched by more than 2mm. It is cut into two equal parts. How much either part can be stretched without breaking?

2mm

1mm

0.5 m

25 m

The word amorphous means:

Regular structured

Frozen structured

None of above

Without form or structure

Conductors have conductivities of order:

10⁷(?m)^-1

10^-6?

10³(?m)-1

10⁷?m^-1

The solids are classified as

Polymeric

Crystalline

All of above

Amorphous