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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.

The breaking of crystals along definite direction is called _____________________?

A Cleavage

B Symmetry

C Isotropy

D Homogeneity

Review Detailed Answer

Correct Answer: Cleavage

The bulk properties of materials such as their mode of fracture can be related to their____________________?

A Polymerization

B Cleavage

C Microstructure

D Dislocation

Review Detailed Answer

Correct Answer: Microstructure

Coercive force is the force which opposes ____________________?

A Demagnetization

B Breakage

C Extension

D Surface cracking

Review Detailed Answer

Correct Answer: Demagnetization

The curie temperature is that at which ____________________?

A Semi-conductor becomes conductors

B Ferromagnetic becomes paramagnetic

C Paramagnetic becomes diamagnetic

D Metals become super conductor

Review Detailed Answer

Correct Answer: Ferromagnetic becomes paramagnetic

Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________?

A Stiffness

B Toughness

C Extension

D Deformation

Review Detailed Answer

Correct Answer: Deformation

A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________?

A (F1+F2) (121+122)

B (F1+F2) (122-112)

C (F1+F2) (12-11)

D (F1+F2) (12-11)

Review Detailed Answer

Correct Answer: (F1+F2) (12-11)

Materials that undergo plastic deformation before breaking are called __________________?

A Brittle

B Ductile

C Amorphous

D Polymers

Review Detailed Answer

Correct Answer: Ductile

A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________?

A 0.025J

B 0.50J

C 0.75J

D 0.100J

Review Detailed Answer

Correct Answer: 0.75J

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 ?

A 2×108 Nm-2

B 5×106 Nm-2

C 0.5×10-6 Nm-2

D 0.2×10-6Nm-2

Review Detailed Answer

Correct Answer: 5×106 Nm-2

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

A Nm-2

B Jm-2

C Nm-1

D Being a number it has no unit.

Review Detailed Answer

Correct Answer: Nm-2

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Physics 914 MCQs [All-Courses]

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All Topics 914

The breaking of crystals along definite direction is called _____________________?

The bulk properties of materials such as their mode of fracture can be related to their____________________?

Coercive force is the force which opposes ____________________?

The curie temperature is that at which ____________________?

Any alteration produced in shapes length or volume when a body is subjected to some external force is called____________________?

A wire obeys Hooks law is of length 11 when it is in equilibrium under a tension F1. Its length becomes 12 when the tension is increased to F2. The energy stored in the wire during this process is____________________?

Materials that undergo plastic deformation before breaking are called __________________?

A uniform steel wire of length 4m and area of cross-section 3×10-6m2 is extended by 1mm by the application of a force. If the youngs modulus of steel is 2×1011 Nm-2 the energy stored in the wire is___________________?

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 ?

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