Deck 13: Pressure, Hookes Law, Forces and Springs, Elasticity, Stress and Strain

Question 1

1 V is equal to {{}}

A)1 J C^-1
B)2 J C^-1
C)1 J^-1 C
D)2 J^-1 C

Answer 1

1 J C^-1

Question 2

Ideal resistance of ammeter is

A)1 Ω
B)2 Ω
C)0 Ω
D)infinite

Answer 2

0 Ω

Question 3

Density of water in kg m^-3 is {{}}

A)1000
B)100
C)10 000
D)4000

Answer 3

1000

Question 4

Normal force acting per unit cross sectional area is called

A)weight
B)pressure
C)volume
D)friction

Question 5

Ratio of tensile to strain is

A)Young's modulus
B)stress
C)stiffness
D)tensile force

Question 6

Gradient of force-extension graph is

A)variable
B)increasing
C)decreasing
D)force constant

Question 7

Energy in deformed solid is called

A)stress energy
B)potential energy
C)kinetic energy
D)strain energy

Question 8

Units of stress are

A)Newton
B)Joules
C)Pascal
D)Watt

Question 9

Concentration of matter in a material is

A)volume
B)mass
C)density
D)weight

Question 10

Units of strain are

A)Newton
B)Joules
C)Watt
D)no units

Question 11

Stress is force applied on

A)volume
B)cross sectional area
C)unit length
D)across diagonal

Question 12

The larger the spring constant, the spring would be more

A)extensible
B)stiffer
C)compressive
D)brittle

Question 13

Height of atmosphere, if atmospheric density is 1.29 kg m^-3 and atmospheric pressure is 101 kPa, is {{}}

A)7839.4 m
B)7829.4 m
C)7849.4 m
D)7859.4 m

Question 14

Pressure in fluid depends upon

A)depth below the surface
B)density of fluid
C)the value of g
D)all of above

Question 15

As depth increases, pressure in a fluid

A)increases
B)decreases
C)remains constant
D)varies

Question 16

If extension in spring is proportional to load applied, then material obeys

A)Newton's law
B)gravitational law
C)Charles's law
D)Hooke's law

Question 17

If a spring is squashed, then forces are

A)extensible
B)compressive
C)normal
D)abnormal

Question 18

Fractional increase in original length is called

A)stress
B)strain
C)tensile force
D)compression

Question 19

If a force of 50 N is applied across the cross-sectional area of 5 × 10 - 7m² then stress applied on it is {{}}

A)1 × 10 8 Pa
B)20 Pa
C)50 Pa
D)100 Pa

Question 20

Mass of steel sphere having density 7850 kg m^-3 and radius 0.15 m is

A)112 kg
B)290 kg
C)110.9 kg
D)300 kg

Question 21

In a force-extension graph, force is taken along horizontal axis because

A)force is independent variable
B)extension is independent variable
C)force is dependent variable
D)all of above

Question 22

Extension and applied force are

A)directly proportional
B)inversely proportional
C)are independent of each other
D)inversely related

Question 23

1 Pa is equal to

A)1N m
B)1 kg
C)1 N m^-1
D)1 N m^-2

Question 24

Spring constant of spring is also called

A)gradient
B)tensile forces
C)stiffness
D)compression

Question 25

Tensile strain is equal to

A)Force per unit area
B)Force per unit volume
C)Extension per unit length
D)Force per unit length