NTS Physics Mcqs Online Test 5

NTS Physics Mcqs Online Test 5 Question Answers Start Below

Which of the following substances posses the highest elasticity?
 

Rubber
Steel
Glass
Copper

Correct!

Wrong!

A rubber cord of cross-sectional area 2cm2 has a length of 1m. When a tensile force of 10N is applied the length of the cord increases by 1cm. What is the youngs modulus of rubber?

2x108 Nm-2
5x106 Nm-2
0.5x10-6 Nm-2
0.2x10-6Nm-2

Correct!

Wrong!

A wire suspended vertically from one end is stretched by attaching a weight of 20N to the lower end. The weight stretches the wire by 1mm. How much energy is gained by the wire?
 

0.01J
0.02J
0.04J
1.0J

Correct!

Wrong!

A ire of length L is stretched by a length ? when a force F is applied at one end. If the elastic limit is not exceeded the amount of energy stored in the wire is

F?
(F?)
F? 2/L
F?2

Correct!

Wrong!

Which one of the following physical quantities does not have the dimensions of force per unit area?
 

Stress
Strain
Youngs modulus
Pressure

Correct!

Wrong!

A certain stress applied to an elastic material produces a certain strain in it. If the elastic limit is not exceeded the energy gained per unit volume of the material is given by?

Stress/strain
(stress/strain)
Stress x strain
(Stress / strain)

Correct!

Wrong!

What is the SI unit of modulus of elasticity of substance?
 

Nm-2
Jm-2
Nm-1
Being a number it has no unit.

Correct!

Wrong!

When a force is applied at one end of an elastic wire it produces at strain ? in the wire. If y is the youngs modulus of the material of the wire the amount of energy stored per unit volume of the wire is given by?

Y?
Y?
Y?2 .
Y?2

Correct!

Wrong!

What are the dimensions of stress?
 

MLT-2
ML-2T-1
ML-1T-2
ML?T-1

Correct!

Wrong!

The figure shown the stress-strain graph of a certain substance. Over which region of the graph is Hooks law obeyed?

AB
BC
CD
ED

Correct!

Wrong!

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