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Physics 914 MCQs [All-Courses]

Physics is a core science subject that deals with the study of matter, energy, motion, force, heat, light, electricity, magnetism, and modern physics concepts. It plays a vital role in competitive exams such as PPSC, FPSC, NTS, OTS, KPPSC, BPSC, AJKPSC, CSS, and PMS, where questions test conceptual understanding, numerical problem-solving, and application of laws and formulas.

A ferromagnet will become fully magnetized at_________________?

A High voltage A.C

B Low voltage A.C

C Alternating current at its peak value

D D.C current at peak value

Review Detailed Answer

Correct Answer: Alternating current at its peak value

The energy band occupied by the valence electrons is called___________________?

A Energy state

B Valence band

C ve energy state

D conduction band

Review Detailed Answer

Correct Answer: Valence band

Formation of large molecule by joining small molecules is_________________?

A Fusion

B Polymerization

C Crystallization

D Subtraction

Review Detailed Answer

Correct Answer: Polymerization

A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?

A The extension of the wire is proportional to the force applied

B The weight of the wire is negligible

C The wire is not stretched beyond its elastic limit

D The cross sectional area of the wire remains constant

Review Detailed Answer

Correct Answer: The extension of the wire is proportional to the force applied

The ration stress to strain in youngs modulus of the material then tension is__________________?

A Directly proportional to extension

B Directly proportional to strain

C Directly proportional to square of amplitude

D Inversely proportional to extension

Review Detailed Answer

Correct Answer: Directly proportional to extension

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_________________?

A Stress/strain

B (stress/strain)

C Stress x strain

D (Stress / strain)

Review Detailed Answer

Correct Answer: (Stress / strain)

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 ?

A 0.01J

B 0.02J

C 0.04J

D 1.0J

Review Detailed Answer

Correct Answer: 0.01J

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_________________?

A Y∝

B 2Y∝

C Y∝/2

D Y∝2

Review Detailed Answer

Correct Answer: Y∝

A wire of length L is stretched by a length E 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_________________?

A FE

B (FE)

C FE2/L

D FE2

Review Detailed Answer

Correct Answer: FE

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

A Stress

B Strain

C Youngs modulus

D Pressure

Review Detailed Answer

Correct Answer: Strain

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Physics 914 MCQs [All-Courses]

All Topics 914

All Topics 914

A ferromagnet will become fully magnetized at_________________?

The energy band occupied by the valence electrons is called___________________?

Formation of large molecule by joining small molecules is_________________?

A wire is stretched by a force F which causes an extension 1. The energy stored in the wire is____________________?

The ration stress to strain in youngs modulus of the material then tension is__________________?

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_________________?

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 ?

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_________________?

A wire of length L is stretched by a length E 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_________________?

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