MDCAT Physics Chapter 13 MCQ Test With Answer for (Deformation of Solids)

The atoms molecules or ions in a crystalline solids are at room temperature

• Motionless A
• Vibrate violently B
• Fixed C
• Simply vibrate D

The solids are classified as:

• Metals A
• Crystalline B
• Amorphous C
• Polymeric D
• All expect A E

• 
  A
• 
  B
• 
  C
• 
  D

In a soft iron, domains are

• easily oriented along external field and do not return to original random positions A
• easily oriented along external field and readily returns to originally random positions B
• do not oriented along external field and also do not returns to original random position C
• none of them D

A rubber cord 100 cm long is elongated 1 cm by a stretching force of 0.2 N. The cross-sectional area of the cord is 0.04 cm². Find the Young's modulus for that rubber.

• 0.5 N cm^-2 A
• 0.05 N cm^-2 B
• 50 N cm^-2 C
• 500 N cm^-2 D

The ultimate tensile strength of the material can be regarded as

• Maximum strength A
• Nominal strength  B
• No strength C
• None of these D

The young s modulus for a perfect rigid body is

• Zero A
• 1 B
• Infinite C
• None of these D

There is a regular arrangement of molecules in

• amorphous solids A
• polymeric solids B
• crystalline solids C
• none of these D

Elastic deformation of a material is the deformation which is

• Permanent  A
• Temporary  B
• Some what permanent  C
• None of these D

Which one of the material is not polymer

• Glass  A
• Natural rubber B
• Polyethene C
• Polystyrene  D

When a silicon crystal is doped with a trivalent element, such an extrinsic semi-conductor is called

• p-type semi-conductor A
• n-type semi-conductor B
• either of them C
• none of them D

After curie temperature iron is

• Ferromgnetic A
• Diamagnetic B
• Paramagnetic C
• None D

The valence band of an atom in a solid

• is always empty A
• may or may not be empty B
• can never be empty C
• none of them D

On applying a stress of 20 x 10⁸Nm^-2, the length of perfectly elastic wire is doubled. Its young' modulus is

• 40 x 10⁸ N/m² A
• 20 x 10⁸N/m² B
• 10 x 10⁸N/m² C
• 5 x 10⁸N/m² D

In metallic crystals which of the following thing remains constant?

• amplitude of oscillations A
• temperature of solid B
• average atomic positions C
• all of them D

The force applied on unit area to produce any change in the shape, volume or length of a body is known as

• strain A
• elasticity B
• stretching C
• stress D

Stress beyond which a permanent deformation is observed in a body is called

• Minimum stress A
• Maximum B
• Yield stress C
• Plastic stress D

Ferromagnetic materials are those in which atoms cooperate with each other

• Weakly A
• Strongly B
• Moderately C
• None of these D

Polymeric solids have the properties like

• No definite shape A
• No definite structure B
• Partially crystalline solids C
• All of them D

In the stress-strain graph stress is increased linearly with strain until a point is reached this point is known as

• Plastic limit A
• Plastic deformation B
• Proportional limit C
• Elastic behaviour D