Physics Mcqs Page 2 - Pak Mcqs Point

Most Important Physics Mcqs

21- The resistance of a conductor increases with:

A. Increase in temperature

B. Decrease in length

C. Increase in cross-sectional area

D. Decrease in temperature

View Answer

Answer : A. Increase in temperature

Description

22- Two like charges:

A. Attract each other

B. Repel each other

C. Neither attract nor repel

D. None of these

View Answer

Answer : B. Repel each other

Description

23- Heat transfer by conduction takes place in:

A. Solids only

B. Liquids only

C. Gases only

D. All states of matter

View Answer

Answer : A. Solids only

Description

24- The temperature at which Celsius and Fahrenheit scales give the same reading is:

A. -40°C

B. 0°C

C. 100°C

D. 273°C

View Answer

Answer : A. -40°C

Description

25- A real image is always:

A. Erect

B. Virtual

C. Inverted

D. Same size as the object

View Answer

Answer : C. Inverted

Description

26- The splitting of white light into its component colors is called:

A. Refraction

B. Diffraction

C. Dispersion

D. Interference

View Answer

Answer : C. Dispersion

Description

27- X-rays were discovered by:

A. Albert Einstein

B. Isaac Newton

C. James Clerk Maxwell

D. Wilhelm Roentgen

View Answer

Answer : D. Wilhelm Roentgen

Description

28- The process in which a heavy nucleus splits into two smaller nuclei is called:

A. Nuclear fusion

B. Nuclear fission

C. Radioactivity

D. Ionization

View Answer

Answer : B. Nuclear fission

Description

29- A body is said to be in uniform motion if:

A. It moves in a circular path

B. Its speed keeps increasing

C. It moves with constant acceleration

D. It moves along a straight line with constant speed

View Answer

Answer : D. It moves along a straight line with constant speed

Description

30- Which of the following is a vector quantity?

A. Displacement

B. Work

C. Distance

D. Speed

View Answer

Answer : A. Displacement

Description

31- Kinetic energy of an object depends on:

A. Mass only

B. Velocity only

C. Both mass and velocity

D. Neither mass nor velocity

View Answer

Answer : C. Both mass and velocity

Description

32- The work done by gravity when an object falls freely is:

A. Positive

B. Negative

C. Zero

D. Infinite

View Answer

Answer : A. Positive

Description

33- Pascal’s law is used in:

A. Hydraulic brakes

B. Water pumps

C. Airplanes

D. Electricity generation

View Answer

Answer : A. Hydraulic brakes

Description

34- The SI unit of pressure is:

A. Newton

B. Pascal

C. Joule

D. Watt

View Answer

Answer : B. Pascal

Description

35- The speed of sound in air at room temperature is approximately:

A. 150 m/s

B. 330 m/s

C. 500 m/s

D. 1000 m/s

View Answer

Answer : B. 330 m/s

Description

36- The phenomenon of sound waves bouncing off a surface is called:

A. Refraction

B. Diffraction

C. Reflection

D. Resonance

View Answer

Answer : C. Reflection

Description

37- The electric charge of a proton is:

A. 0 C

B. -1.6 × 10⁻¹⁹ C

C. +9.1 × 10⁻³¹ C

D. +1.6 × 10⁻¹⁹ C

View Answer

Answer : D. +1.6 × 10⁻¹⁹ C

Description

38- A material that allows electricity to flow easily is called a:

A. Conductor

B. Insulator

C. Semiconductor

D. Resistor

View Answer

Answer : A. Conductor

Description

39- Which law states that heat flows from a hotter object to a colder one?

A. Zeroth law of thermodynamics

B. Second law of thermodynamics

C. First law of thermodynamics

D. Third law of thermodynamics

View Answer

Answer : B. Second law of thermodynamics

Description

40- In an adiabatic process, which quantity remains constant?

A. Temperature

B. Pressure

C. Volume

D. Heat

View Answer

Answer : D. Heat

Description