Free Physics in Daily Life MCQs with Answers

1. Sound cannot travel through which of the following?

• A. Water
• B. Steel
• C. Vacuum
• D. Air

Explanation: Sound is a mechanical wave and requires a material medium whose particles can vibrate. A vacuum contains no particles, so sound cannot propagate through it. This is why astronauts must use radio, which is an electromagnetic wave and needs no medium.

2. The state of matter that has the highest kinetic energy is _________?

• A. Solid
• B. Liquid
• C. Gas
• D. NOT

Explanation: Gas particles move most freely and rapidly, so they have the highest average kinetic energy among the three common states. Solids have the least particle motion, while liquids are intermediate.

3. Light can be considered as__________Signal?

• A. Electromagnetic
• B. Neutral
• C. Chemical
• D. Acoustic

Explanation: Light is an electromagnetic signal because it consists of oscillating electric and magnetic fields and does not need a material medium to travel. Acoustic signals, by contrast, are sound waves and require a medium.

4. Which famous scientist formulated the laws of motion and universal gravitation?

• A. Isaac Newton
• B. Galileo Galilei
• C. Albert Einstein
• D. Nikola Tesla

Explanation: Isaac Newton formulated the three laws of motion and the law of universal gravitation. Galileo influenced the study of motion, while Einstein later developed relativity.

5. The waves which are used for line of sight (LOS) communication are called:

• A. Space waves
• B. Cable waves
• C. Antenna waves
• D. None of thesePhysics Mcqs

Explanation: Line-of-sight radio communication uses space waves, which travel directly through the lower atmosphere from transmitting to receiving antennas. Cable and so-called antenna waves are not the standard propagation categories.

6. In the structure of fiber, the light is guided through the core due to total internal:

• A. Reflection
• B. Refraction
• C. Diffraction
• D. None of these

Explanation: Optical fibre guides light by total internal reflection at the boundary between its denser core and less-dense cladding. Refraction changes direction at a boundary, but it is not the guiding principle named here.

7. Which of the following is a neutral particle ?

• A. Alpha particle
• B. Neutron
• C. Electron
• D. Proton
• E. All of theseExam preparation materials

Explanation: A neutron has no net electric charge, whereas an alpha particle and proton are positive and an electron is negative. Thus only the neutron is neutral among the listed particles.

8. A chronometer meter measures __________ ?

• A. Water waves
• B. Color contrast
• C. Time
• D. Sound waves

Explanation: A chronometer is a precision instrument for measuring or keeping time, so its measured quantity is time. Water waves and sound waves are physical phenomena, not what a chronometer measures.

9. The blotting paper helps observe liquid by__________?

• A. Surface Action
• B. Capillary Action
• C. Viscosity
• D. Boldness

Explanation: Tiny pores in blotting paper act like narrow tubes, drawing liquid through them by capillary action. This is why ink or water spreads through the paper without being poured.

10. The SI unit of charge is __________?

• A. Ampere
• B. Coulomb
• C. Ohm
• D. Volt

Explanation: The coulomb is the SI unit of electric charge, equal to the charge transferred by a current of one ampere in one second. Ampere measures current, while volt measures potential difference and ohm measures resistance.