Physics - Properties of Solids

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Question - 1

A spring is stretched by applying a load to its free end. The strain produced in the spring is  

  • A volumetric 
  • B shear
  • C longitudinal and shear
  • D longitudinal

Question - 2

Upto which point on stress - strain graph of a metal wire, the material remains elastic? 

  • A Proportional limit 
  • B Yield point 
  • C Ultimate point
  • D Breaking point

Question - 3

The maximum load which a wire can with stand without breaking, when its length is reduced to half of its original length, will 

  • A be doubled
  • B be half
  • C be four times
  • D remains same 

Question - 4

What would be the ratio of breaking maximum load of circular rod (radius r) to maximum load, if same rod is moulded into square rod of same length? 

  • A \(1:1\)
  • B \(1:2\pi \)
  • C \(2:\pi \)
  • D \(\pi :2\)

Question - 5

A wire of length l is tied to the ceiling and weight w is tied to the lower end. If now put on pulley and weight w is attached to both sides of wire. Then, total extension in wire would be 

  • A \(\Delta l\)
  • B \(2:\Delta l\)
  • C \(\frac { \Delta l }{ 2 } \)
  • D \(4:\Delta l\)

Question - 6

Two wires of the same length and same material but radii in the ratio of 1:2 are stretched by unequal forces to produce equal elongation. The ratio of two forces is 

  • A \(1:4\)
  • B \(1:2\)
  • C \(2:1\)
  • D \(1:\sqrt { 2 } \)

Question - 7

How many elastic coefficients are required to describe the elastic properties of solids?

  • A 1
  • B 2
  • C 3
  • D 4

Question - 8

Which of the following statement(s) is incorrect?

  • A Metals have larger values of Young's modulus than alloys and elastomers.
  • B Young's modulus and shear modulus is relevant only for solids
  • C Bulk's modulus is applicable only for gases and liquids
  • D Steel is more elastic than rubber

Question - 9

If a spherical ball is taken out from a deep pond, then its volume increases by 0.01%. If the bulk modulus of material is G=1010 N/m2. Then, the depth of pond should be (take, g=10 m/s2)

  • A 1 m
  • B 50 m
  • C 1000 m
  • D 100 m

Question - 10

A spring of constant K is cut into two parts of length in the ratio 2:3. The spring constant of larger spring is 

  • A \(\frac { 5 }{ 3 } K\)
  • B \(\frac { 2 }{ 3 } K\)
  • C \(K\)
  • D \(\frac { 3 }{ 5 } K\)
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