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

The SI unit of strain is

• N A
• dynes B
• pascal C
• dimensionless D

Strain is dimensionless and has

• Units A
• No units B
• S.I. units C
• None of these D

The energy dissipated per cycle for iron in hysteresis loop is

• less than for steel A
• equal to the steel B
• more than the steel C
• any one of them D

When a sillicon crystal is doped with a pentavalent 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

An atom in which there is a resultant magnetic field behave like a

• Tiny magnet A
• Magnetic dipole B
• No magnet C
• a and b D

Which one of the following is polymer

• Polythene A
• Polystyrene B
• Nylon C
• All D

The critical temperature for mercury is

• 1.18 K A
• 4.2 K B
• 3.72 K C
• 7.2 K D

• 
  A
• 
  B
• 
  C
• 
  D

The young modulus of steel is greater than that of aluminium.

Keeping the statement above in mind state which of the following is true

• Steel requires a larger stress on it for a given strain than does aluminium A
• Aluminium requires more force than steel does to get a similar extension as steel B
• Steel requires less force than aluminium does to get a similar extension as aluminium C
• Steel requires a larger strain on it for a given stress than does aluminium 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

Semiconductors, like Ge or Si at room temperature becomes a

• Semiconductor A
• Conductor B
• Insulator C
• None of these D

The ultimate tensile strength (UTS) can be regarded as the

• Maximum strength of the material A
• Nominal strength of the material B
• Minimum strength of the material C
• None of these D

Which of the material have largest value of young's modulus

• Copper A
• Diamond B
• Aluminum C
• Iron D

When a crystal is subjected to stress, it tends to break or fracture along definite direction which is characteristic of a simple. This is called

• Cleavage A
• Allotropy B
• Isotropy C
• None of these D

In crystalline solids, atoms are held about their equilibrium positions depending upon the strength of:

• Adhesive forces A
• Nuclear forces B
• Inter atomic cohesive force C
• Electromagnetic force D
• None of these E

The atom or molecules in crystalline solids are held together by:

• Cohesive force A
• Adhesive force B
• Gravitational force C
• Magnetic forces D

An ordinary glass gradually softens into a paste-like state before it becomes a very viscous liquid. It happens almost at:

• 800°C A
• 500°C B
• 300°C C
• 100°C D
• None of these E

The metals become a magnetic material because of their

• Hardness A
• Alignment of atoms B
• Structure C
• All of them D

When the deformation produced in the material becomes permanent, this type of behaviour is called

• proportionality A
• elasticity B
• plasticity C
• none of them 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