100+ Gk Question and Answer about Physics

Here are 100+ Gk Question and Answer about Physics:

Q.1 Who is known as father of modern physics?

Answer: Albert Einstein

Q.2 Which device is used to limit the current in an electrical circuit?

Answer: Fuse

Q.3 What is the minimum numbers of unequal vectors which can give zero resultant?

Answer: Three

Q.4 Water is not suitable as a calorimetric substance because?

Answer: It has high specific heat

Q.5 Which types of coal produces most heat per unit?

Answer: Anthracite

Q.6 When a body falls from an aeroplane, there is increase in its?

Answer: Kinetic Energy

Q.7 Which waves is used for communication by artificial satellites?

Answer: Micro waves

Q.8 The energy of the sun is continuously created due to?

Answer: Nuclear fusion

Q.9 When the barometer reading dips suddenly, it is an indication of?

Answer: Storm

Q.10 Coolidge tube is used to produce which rays?

Answer: X-rays

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50 Miscellaneous Gk MCQs about Physics

Q.11 Which is the fourth state of matter?

Answer: Plasma

Q.12 Gamma rays have greatest similarity with?

Answer: X-Rays

Q.13 The sounds having a frequency of 20 Hertz to 20,000 Hertz are known as?

Answer: Audible Sound

Q.14 In the absence of ozone layer, which rays will enter into atmosphere?

Answer: Ultraviolet Rays

Q.15 Which physical quantity is measured in ‘Siemens’? 

Answer: Electrical conductance

Q.16 Which instrument is used to measure density?

Answer: Pycnometer

Q.17 The angular velocity depends upon the rate of change of the _______.

Answer: Angular Displacement

Q.18 The Lambert’s law is related to?

Answer: Illumination

Q.19 Who formulated the law of universal gravitation?

Answer: Sir Isaac Newton

Q.20 The Tides on Earth is caused by?

Answer: Gravitational interaction between the Earth, Moon, and Sun.

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50+ Gk MCQs about Physics: Units, Dimension and Motion

Q.21 What keeps planets to orbit around the Sun?

Answer: The gravitational pull of the Sun.

Q.22 What type of wave is sound?

Answer: Sound is a longitudinal mechanical wave.

Q.23 What is the SI unit of loudness of sound?

Answer: The decibel (dB).

Q.24 What is the SI unit of work?

Answer: The joule (J).

Q.25 What is energy?

Answer: Energy is the capacity to do work.

Q.26 What are the two main types of mechanical energy?

Answer: Kinetic energy and Potential energy.

Q.27 What is the SI unit of power?

Answer: The watt (W).

Q.28 What is the unit of electric charge?

Answer: The coulomb (C).

Q.29 What is an electric current?

Answer: Electric current is the flow of electric charge per unit time, measured in Amperes (A).

Q.30 What is the formula for electric current?

Answer: I=V/R

Q.31 What is the SI unit of resistance?

Answer: The ohm (Ω).

Q.32 Who discovered electromagnetic induction?

Answer: Michael Faraday.

Q.33 Which method is use for protecting iron from rusting, by coating a thin layer of Zinc?

Answer: Galvanizing

Q.34 ‘Curie’ is unit of?

Answer: Radioactivity

Q.35 The hydraulic brakes used in automobiles is a direct application of which law?

Answer: Pascal’s law

Q.36 Energy that is produced from coal is called which energy?

Answer: Thermal Energy

Q.37 What is used to split white light into different colours?

Answer: Prism

Q.38 Solar energy is converted into chemical energy during?

Answer: Photosynthesis

Q.39 The term ‘Isoneph’ indicates the lines of equal?

Answer: Cloudiness

Q.40 The type of mirrors used in the headlamp of cars?

Answer: Concave Mirrors

Q.41 The rate of transfer of charges through a circuit is called?

Answer: Electric Current

Q.42 The filament of electric bulb is made up of?

Answer: Tungsten

Q.43 In MRI machine, which wave is used?

Answer: Radio wave

Q.44 Amount of water vapour in the atmosphere is measured in terms of?

Answer: Humidity

Q.45 Which element is used in thermometric substance is _____.

Answer: Mercury

Q.46 The energy that can harness heat stored below the earth’s surface is known as?

Answer: Geothermal Energy

Q.47 What was invented by ‘Zacharias Janssen’?

Answer: Microscope

Q.48 The force which opposes the relative motion between different layers of liquid or gases is called?

Answer: Viscous Force

Q.49 Who developed the technology of under-ground nuclear explosion?

Answer: Dr. Homi J. Bhabha

Q.50 Sensitivity of the human eye is maximum in which colour?

Answer: Yellowish-Green

Q.51 A rocket works on the principle of conservation of?

Answer: Linear Momentum

Q.52 Which layer of the earth’s atmosphere reflects back the radio waves to the earth’s surface?

Answer: Ionosphere

Q.53 Which particles move with same kinetic energy. Which of them has maximum momentum?

Answer: Alpha Particle

Q.54 Small bubbles are perfectly spherical because of?

Answer: Surface tension

Q.55 In mirrors the back surface is coated with a thin layer of?

Answer: Silver

Q.56 Hypermetropia or long sight can be corrected by using?

Answer: Convex lenses

Q.57 Stars appear twinkling because of ______ light.

Answer: Refraction

Q.58 What is used to remove Astigmatism for a human eye?

Answer: Cylindrical lens

Q.59 The audio signals of TV are?

Answer: Frequency Modulated (FM)

Q.60 Which parts of the sunlight makes the solar cooker hot?

Answer: Infra Rays

Q.61 What is colour of light related to?

Answer: Wavelength

Q.62 What is used for accurately measuring very small-time intervals?

Answer: Atomic clocks

Q.63 The material which can be deformed permanently by heat and pressure is called?

Answer: Thermoset

Q.64 A device used for converting A.C. into D.C. is called?

Answer: Rectifier

Q.65 Which is the strongest force in nature?

Answer: Nuclear Force

Q.66 ‘SONAR’ is mostly used by?

Answer: Navigators

Q.67 Who invented X-Ray machine?

Answer: Wilhelm Roentgen

Q.68 Persistence of vision is the principle behind?

Answer: Cinema

Q.69 Who invented Electron Microscope?

Answer: Max Knoll and Ernst Ruska

Q.70 Which instrument is use for measuring intensity of earthquakes?

Answer: Seismograph

Q.71 Which type of mirrors are used in car headlights?

Answer: Concave Mirrors

Q.72 Which atmospheric layer contains ozone layer?

Answer: Stratosphere

Q.73 The spokes used in the wheel of a bicycle increase its?

Answer: Moment of inertia

Q.74 Which process involved in making soap?

Answer: Saponification

Q.75 What is unit of electrical power?

Answer: Watt (W)

Q.76 Which scientist first invented the gramophone?

Answer: Thomas Alva Edison

Q.77 What is the unit of distance in navigation?

Answer: Nautical mile

Q.78 Which colour of light shows maximum deviation when passed through a prism?

Answer: Violet Light

Q.79 0°K is equivalent to how much degree?

Answer: -273°C

Q.80 Which law is also called the law of inertia?

Answer: Newton’s first law

Q.81 Which plastic material commonly used for making gear wheels?

Answer: Nylons

Q.82 What is the working principle of a washing machine?

Answer: Centrifugation

Q.83 Which part of the eye have the largest refractive index?

Answer: The Cornea

Q.84 Which instruments is used to measure humidity?

Answer: Hygrometer

Q.85 A steam engine converts the heat energy of steam into _____.

Answer: Mechanical energy

Q.86 Who developed the theory of Evolution?

Answer: Charles Darwin

Q.87 Who invented the Lightning Rod in 1749?

Answer: Benjamin Franklin

Q.88 When the milk is churned strongly the cream from it is separated out due to?

Answer: Centrifugal force

Q.89 Which instrument is used to record Atmospheric pressure?

Answer: Barometer

Q.90 The study of phenomena at very low temperatures is called?

Answer: Cryogenics

Q.91 what is the SI unit of luminious intensity?

Answer: Candela (cd)

Q.92 When a piece of stone is immersed in water, it displaces water of equal?

Answer: Mass

Q.93 When the locomotion of insects to the source of light is called?

Answer: Phototaxis

Q.94 The splitting of white light into its components is due to what?

Answer: Dispersion

Q.95 Which waves cannot be transmitted through vacuum?

Answer: Sound Waves

Q.96 The boiling point of water depends upon the?

Answer: Atmospheric pressure

Q.97 The loudness of sound depends upon?

Answer: Amplitude

Q.98 1 pound is equal to how many ounces?

Answer: 16

Q.99 Sound of frequency below 20 Hz is called ______.

Answer: Infrasonic Sound

Q.100 What is the phenomenon which established the transverse nature of light?

Answer: Polarisation

Q.101 The waveform of a certain signal can be studied by?

Answer: Cathode Ray Oscilloscope

Q.102 The Ultrasonic waves are produced by which material?

Answer: Piezo electric material

Q.103 Radioactive elements can be traced out in living cell through what?

Answer: Auto radiography

Q.104 In a filament light bulb most of the electric power consumed as?

Answer: infra-red rays

Q.105 What is the SI unit of surface tension?

Answer: N/m

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