### Physics - Properties of Solids

#### 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 $\frac { 3 }{ 5 } K$