physics MCQs - 9th class Chapter 09 Mcqs

1

What is the fundamental science that deals with matter, energy, space, and time?

A

Chemistry

B

Biology

C

Physics

D

Geology

2

Which branch of science studies non-living things?

A

Biological sciences

B

Social sciences

C

Physical sciences

D

Life sciences

3

The study of motion and the physical effects that influence it is called:

A

Optics

B

Mechanics

C

Acoustics

D

Thermodynamics

4

Which branch of physics deals with the nature and physical aspects of audible sound energy?

A

Optics

B

Electromagnetism

C

Acoustics

D

Nuclear Physics

5

Quantum Mechanics explains the behavior of particles at what level?

A

Celestial and planetary

B

Macroscopic

C

Atomic and subatomic

D

Geological

6

The study of the properties of atomic nuclei is known as:

A

Particle Physics

B

Nuclear Physics

C

Astrophysics

D

Geophysics

7

Which field applies physical principles to study the Earth's internal structure and magnetic fields?

A

Cosmology

B

Astrophysics

C

Climate Physics

D

Geophysics

8

What is the first step in the scientific method?

A

Hypothesis

B

Experiment

C

Observation

D

Theory

9

An explanation proposed as a starting point for further investigation is a:

A

Law

B

Theory

C

Hypothesis

D

Prediction

10

A theory that has been tested many times and is generally accepted is called a:

A

Hypothesis

B

Conjecture

C

Law

D

Postulate

11

The concept that a theory must make testable predictions that could be proven false is called:

A

Predictability

B

Falsifiability

C

Repeatability

D

Verifiability

12

Automobile technology is primarily based on the principles of:

A

Optics

B

Thermodynamics

C

Acoustics

D

Electromagnetism

13

Laser technology is based on the principles of:

A

Atomic physics

B

Classical mechanics

C

Geophysics

D

Thermodynamics

14

Which of the following is an example of an interdisciplinary field of physics?

A

Biophysics

B

Mechanics

C

Optics

D

Acoustics

15

What does the discipline of Cosmology explore?

A

Subatomic particles

B

The Earth's climate

C

The large structure and evolution of the universe

D

The properties of solids

16

The study of heat and thermal energy is covered under which branch?

A

Mechanics

B

Heat and thermodynamics

C

Optics

D

Electromagnetism

17

What is the study of the physical aspects of visible light called?

A

Acoustics

B

Optics

C

Relativistic Mechanics

D

Particle Physics

18

Relativistic mechanics explains how space and time are related to the:

A

Observer

B

Temperature

C

Pressure

D

Sound

19

The study of subatomic and elementary particles is the focus of:

A

Nuclear Physics

B

Solid State Physics

C

Particle Physics

D

Astronomy

20

The application of computational techniques to solve complex physical problems is called:

A

Climate Physics

B

Medical Physics

C

Computational Physics

D

Geophysics

21

The single discipline from which science originated was known as:

A

Metaphysics

B

Alchemy

C

Natural Philosophy

D

Scholasticism

22

At the beginning of which century was scientific knowledge classified into biological and physical sciences?

A

18th century

B

19th century

C

20th century

D

17th century

23

Time is considered which dimension in physics?

A

First

B

Second

C

Third

D

Fourth

24

The phenomenon of time dilation is discussed in the special theory of:

A

Gravitation

B

Relativity

C

Quantum Mechanics

D

Electromagnetism

25

The bending of light around massive objects is an example of the influence of:

A

Magnetism

B

Electric charge

C

Gravity and speed

D

Temperature

26

Which branch is often called classical mechanics?

A

Quantum Mechanics

B

Relativistic Mechanics

C

Mechanics (based on Newton's laws)

D

Thermodynamics

27

The study of the distribution of celestial bodies like planets and stars is:

A

Cosmology

B

Astronomy

C

Astrophysics

D

Geophysics

28

MRI and CT scans are examples of imaging techniques from which field?

A

Biophysics

B

Medical Physics

C

Astrophysics

D

Geophysics

29

What is the second step in the scientific method, following observation?

A

Formulating a theory

B

Gathering information

C

Proposing a hypothesis

D

Conducting an experiment

30

A logical explanation of the causes and effects of an issue or event in nature is a:

A

Hypothesis

B

Law

C

Prediction

D

Theory

31

Radar technology is based on the principles of detection and reflection of:

A

Sound waves

B

Light waves

C

Electromagnetic waves

D

Water waves

32

Who designs instruments, tools, and builds things to meet specific needs?

A

Scientists

B

Theorists

C

Engineers

D

Technologists

33

The study of the physical properties of matter in solid form is:

A

Particle Physics

B

Solid State Physics

C

Nuclear Physics

D

Plasma Physics

34

Which field deals with atmospheric dynamics, climate change, and weather conditions?

A

Geophysics

B

Astrophysics

C

Climate Physics

D

Cosmology

35

Sharing knowledge through online exchanges, conferences, and workshops contributes to:

A

Rapid advances in science

B

Slowing down research

C

Creating scientific competition

D

Limiting information

36

What does an experiment aim to test?

A

The law

B

The truth of a hypothesis

C

The prediction

D

The observation

37

If an experiment's results do not agree with a prediction, what is usually done?

A

The experiment is ignored

B

The law is changed

C

The hypothesis is changed or rejected

D

The data is altered

38

Engineering is the process of applying technologies and what else?

A

Philosophical ideas

B

Artistic principles

C

Scientific principles

D

Economic theories

39

The mutual relationship between electric current and magnetic field is studied in:

A

Mechanics

B

Thermodynamics

C

Electromagnetism

D

Acoustics

40

Which of these is NOT listed as a sub-field of physics in the chapter?

A

Particle Physics

B

Quantum Mechanics

C

Astrology

D

Geophysics

41

The interaction between matter and energy in space is studied in which field to understand the universe?

A

Biophysics

B

Astrophysics

C

Medical Physics

D

Climate Physics

42

What is required for a solution to complex issues like climate change?

A

A single discipline's focus

B

Multifacet expertise

C

Ignoring the problem

D

Limited research

43

Nano-technology is described as a blend of physics, chemistry, material science, and what else?

A

Biology

B

Engineering

C

Geology

D

Astronomy

44

The development of 'artificial intelligence' involves computer science, mathematical logic, and what other field?

A

Neuroscience

B

Geophysics

C

Acoustics

D

Optics

45

What is the final step in the scientific method that results from repeated testing of a theory?

A

Hypothesis

B

Observation

C

Formulation of a law

D

Prediction

46

What does a civil engineer consider when designing a bridge?

A

Only the cost

B

Only the aesthetics

C

Cost effectiveness and safety measures

D

Only the materials

47

Technology is defined as the methods and techniques developed using:

A

Engineering principles

B

Philosophical thought

C

Scientific knowledge

D

Trial and error

48

The branch of physics dealing with the physical principles of the environment is:

A

Geophysics

B

Climate Physics

C

Astrophysics

D

Biophysics

49

According to the text, science is a collective knowledge about what?

A

Human history

B

Social structures

C

Natural phenomena, processes, and events

D

Economic systems

50

What process proves that light travels in a straight line, as described in the text?

A

Shadow formation

B

Using four card boards with holes

C

Observing a rainbow

D

Bending of light