General Science Physics Question and Answers - Gk Quiz (Updated 2021) - Once More Agen

General Science Physics Question and Answers

 General Science Physics Question and Answers 

• Who invented the electronic computer?

Ans. - Eckert and Mashalie.

• What is the coolant pipe used to produce?

Ans. - X-Rays.

• Pyrometer is used in measuring?

Ans. - High Temperature.

• What is the rotation per second of a flywheel measured?

Ans. - Stroboscope. 

• What is the device used to measure the intensity of the sun's rays?

Ana. - Hygrometer. 

• Which device is used to find the position of objects immersed in the ocean?

Ans. - Sonar. 

• What equipment is used by medical doctors / professionals?

Ans. - Stethoscope.

• Who propounded the Krishna Hole theory? 

Ans. - S. Chandrasekhar

• The Nobel Prize began in the name of Alfred Nobel, who invented? 

Ans. -  Dynamite

• Who invented the airplane at the beginning of this century? 

Ans. - Wright Brothers

• Who invented the electron microscope? 

Ans. - Knoll and Ruska.

• What causes a huge amount of energy to explode in a nuclear bomb?

Ans. - Change of material into energy.

• What are impurities added on the basis of its use in semiconductor?  

Ans. - Increase its electrical conductivity.

• When arsenic atoms are added to the germanium lattice, what does it become?  

Ans. - External Semiconductor.

• Which metal is used to generate electricity?

Ans. - Uranium.

• If the electrical resistance of a conventional material falls to zero, what is that substance called?

 Ans. - Semiconductor.

• What is a static electrical precipitator used to control?  

Ans. - Air Pollutants.

• In which direction does the freely suspended magnetic needle stick?

Ans. - North to South direction

• Earth is a huge magnet. In which direction does its magnetic field extend? 

Ans. - South to North.

• What is the mass number of an element that has two protons, two neutrons and two electrons in an atom?

Ans. -  4.

• By what method is the age of the earth determined?  

Ans. - Uranium Method

• What is the Coolidge tube used to generate? 

Ans. X-Rays.

• How do we produce white light in the tube? 

Ans. - By heating the fiber.

• The speed of light passing through which is minimum?  

Ans. - Glass.

• On which date is your shadow the shortest in the afternoon? 

Ans. - 21 June.

• Photon is the basic unit / volume of 

Ans. - Light.

• What is confirmed by the particle composition of radiation? 

Ans. - Light Electrical Effect.

• Which lens should be used to correct impurities? 

Ans. - Cylindrical lens.

• By whom is the alternating current replaced by a direct current? 

Ans. - Rectifier.

• The element of an electric bulb is made up of?

Ans. - Tungsten.

• Approximately how much of the energy expended in tube light is converted into light? 

Ans. -  60–70ø.

• Who invented lightning conductor? 

Ans. - Benjamin Franklin.

• What is the grade of the result of the electrical resistance of the human body dry? 

Ans. - 106 ohm.

• Which metal is used to generate electricity? 

Ans. - Uranium.

• What is a semiconductor chip used in an integrated circuit made of? 

Ans. - Silicon.

• Which lens is used to correct near–term defects? 

Ans. - Concave.

• What type of image does a concave lens always make?

 Ans. - Virtual Image.

• On what principle does the fiber optic used in communication only work?

Ans. - Full internal reflection of light.

• Which lens is used in the glasses of a person suffering from vision impairment? 

Ans. - Convex lens.

• What does a watch instrument use to look at the fine parts of a watch? 

Ans. - Magnified lenses.

• How does the signal flow in fiber optical communication? 

Ans. - Light wave.

• Which one of the glass can dissect ultraviolet rays?  

Ans. - Crooks Glass.

• Which of the types of light is most rapidly absorbed by the plant? 

Ans. - Blue and Red.

• Which waves will be affected when light waves pass through the glass into the air? 

 Ans. - Wavelength and velocity only.

• Which part of the photographic camera acts like the retina of the eye? 

Ans. - Film.

• What type of lens is used in the camera? 

Ans. - Convex.

• On which part of the human eye does the image form? 

Ans. - Retina.

• Which part of the eye controls the amount of light entering the eye? 

Ans. - Iris.

• Which part of the donor's eye is transplanted into the eye donation?

 Ans. - Cornea.

• What is the minimum clear vision distance for a healthy eye? 

Ans. - 25 cm.

• If a person cannot see distant things clearly, what will be the fault in his eyes?

Ans. - Myopia.

• The making of bright colors in thin foam of soap is the result of which phenomenon?  

Ans. - Multiple reflections and deviations

• What type of mirror is used in automobile to see the back side traffic? 

 Ans. - Convex

• What type of mirror is used in the headlights of vehicles? 

Ans. - Reflective mirror

• What type of mirror should be used to see the traffic behind you while driving a car? 

 Ans. - North Mirror

• What image is formed on the retina of the human eye? 

 Ans. - Real and Reverse

• If a person stands between two plane mirrors which are inclined at 60॰ angle, then how many images will he see?

Ans. - 5

• We receive sunlight on the surface of the earth. What type of beam are these lights?  

Ans. - Parallel

• Whose unit is the diopter? 

Ans. - Lens Capacity

• How many colors of white light are made of?

 Ans. - 7

• Which color has maximum wavelength? 

Ans. - Red

• How many colors does the sun's rays have? 

Ans. - 7

• If the atmosphere is not there, what color will the sky appear from the earth? 

Ans. - Black

• How far from a reflective plane should a person be able to hear their resonance? 

Ans. - 56 feet

• On what principle does a stethoscope sound? 

Ans. - Reflection

• The whistle frequency or sharpness of the approaching train increases, due to which event? 

Ans. - Dappler Effect

• Which type of wave is used in the night vision device?  

Ans. - Infrared Wave

• A jet aircraft is flying in the air at a velocity of 2 Mach. When the velocity of sound is 332 m/s. If so, how much is the speed of the aircraft?  

Ans. - 664 m/s

• Which medium will have the maximum speed of sound at a temperature of about 20॰C? 

Ans. - Iron

• A biological method that uses altruistic sound? 

Ans. - Sonography

• What is the device that is used for identifying and treating sound waves? 

Ans. - Sonar

• What kind of wave is a light wave? 

Ans. - Transverse Wave

• The wave theory of light was established by 

Ans. - Hygens

• On the basis of which phenomena is the light waves transverse confirmed? 

Ans. - Polarization

• Who discovered the electromagnetic form of light? 

 Ans. - Maxwell

• Who first showed that light waves diffract? 

Ans. - Gramaldi

• Which phenomena do not occur in both light and sound?  

Ans. - Polarization

• Which theory confirms the waveform of light?

 Ans. - Theory of Interpretation

• Approximately how long does it take for light to reach the Earth from the moon? 

 Ans. - 1 second

• How long does it take for sunlight to reach the earth? 

 Ans. - 8 minutes 16.6 seconds

• What is the speed of light in air? 

Ans. - 3108 m/s

• Which part of the sun is visible at the time of solar eclipse? 

 Ans. - Kirit (Corona)

• For what reason does a coin in a vessel filled with water appear to be slightly raised? 

Ans. -  Due to refraction of light

• A stick immersed in water appears to be bent due to which behavior?  

Ans. -  Refraction of light.

• What makes the sky look blue? 

Ans. -  Scattering.

• What causes red color in the sky at sunrise and sunset? 

 Ans. -  Scattering.

• What color deflection is more in the rainbow?  

Ans. -  Purple.

• Why does dry sand appear shiny? 

Ans. -  The reason for this is reflection.

• Which one mirror is used to make periscope? 

Ans. -  Plane mirror.

• To what degree will the 0° F scale of the Celsius scale be equal to? 

Ans. -  32॰.

• The human body temperature is 98.6° C. How much would it be on the Celsius scale? 

 Ans. -  37॰C.

• Which is used to measure very short time intervals accurately?  

Ans. -  Atomic clocks.

• If a man has a temperature of 60॰C, what will be his temperature in Fahrenheit?  

Ans. -  140॰F.

• At what temperature is the density of water maximum? 

 Ans. -  4॰C.

• Why do bicycle tubes explode most of the summer?  

Ans. -  The tube bursts due to heat.

• The surface water of a lake is just about to freeze. What will be the temperature of the water in the lower level of the lake?  

Ans. -  4॰C.

• In which method of transmission of heat, molecules of matter do not move from one place to another by themselves?  

Ans. -  Driving.

• By which method does heat transfer to liquids and gases?  

Ans. - Convection.

• What type of communication medium does the heat of the Sun come to Earth? 

 Ans. -  Radiation.

• In which method of heat transfer is the medium not necessary?  

Ans. -  Radiation.

• Which is the method of heat transmission in which the particles of the medium do not move? 

Ans. -   Radiation  . 

•  What is the transmission of heat through molecular composition? 

Ans. -   Convection.

• Which part of sun radiation heats up the solar cooker?

Ans. -  Infrared Rays.

• Which color combination is most appropriate to avoid sunlight?  

Ans. -  Black above, white down.

• By which method the thermos flask walls are smeared to minimize heat transfer?

 Ans. -  Radiation.

• What is the effect of melting point on mixing of waste? 

Ans. -  Decreases.

• Where will the rice take longer to cook?

Ans. -  Mount Everest.

• What is the process of converting a liquid into vapor before its boiling point?

Ans. -  Evaporation.

• The concept of internal energy resembles which law of thermodynamics? 

Ans. -  First rule.

• Which concept confirms the first law of thermodynamics? 

Ans. - Energy Conservation.

• At which point is the Fahrenheit temperature twice the centigrade temperature? 

Ans. -  160॰F.

• On what does the specific heat of an object depend?  

Ans. - On the mass of the body.

• Which temperature measurement in Celsius is equal to 300 Gy? 

Ans. - 27॰C.

• Whose radiation can a black body absorb? 

Ans. -  High wavelength only.

• In winter, what kind of weather do we feel colder?  

Ans. -  Clear weather.

• Due to which action in the pot of water, water remains cold? 

 Ans. -  Evaporation.

• Who first generated parasitic waves by whistling? – 

Ans. -  Galton .

• Which is used in cleaning the internal parts of aircraft?  

Ans. -  Ultrasonic wave.

• In what frequency range does a person experience sound vibrations? 

 Ans. -  20–20,000 Hz.

• Which sound symptoms cause a sound to be thick (Shrill)?  

Ans. -  Pitch.

• Which one causes the most noise pollution?  

Ans. -  Flying the plane.

• Which process does not occur in both light and sound? 

 Ans. -  Polarization.

• How long does the effect of sound stay in the human ear? 

Ans. -  1/10 second.

• What causes sound waves to generate resonance? 

Ans. -  Reflection.

• What is the unit of work?  

Ans. - Joule.

• Light Year is the unit for? 

 Ans. -  Distance.

• Lumen is the unit for? 

Ans. -  Luminous Flux.

• Marie Curie actually coined the term? 

Ans. -   Radioactivity.

• What physical amount is obtained by the ratio of momentum and velocity of matter? 

 Ans. -  Mass.

• Swimming in water is possible due to which law of motion of Newton? 

 Ans. -  Third Rule.

• On what principle is the functioning of a rocket based? 

Ans. -  Momentum Conservation.

• If the horse starts moving suddenly, the reason for the fall of the cavalry is 

 Ans. -  Relaxation Inertia.

• For cleaning the carpet, if it is beaten with a stick, then what rule applies in it?

 Ans. -  Newton’s first Law of Motion or Law of Inertia.

• How much of the iceberg does it float above the surface of the sea?  

Ans. -  1/10.

• Which is produced to convert solar energy using light voltaic cell? 

Ans. -  Optical Energy.

• The use of hydraulic brakes in automated vehicles is virtually a direct application of which rule? 

Ans. -   Pascal's law.

• When milk is strongly churned, what causes the cream to separate from it?  

Ans. -  Centrifugal Force.

• The jet engine works on the principle of protection of  

Ans. -  Linear momentum.

• What is the approximate height of a synchronous satellite from the earth's surface?  

Ans. -  36,000 KM.

• How much of the Earth's gravity is closest to the Moon's gravity? 

Ans. -  1/6.

• What causes the droplet to become spherical?  

Ans. -  Surface Tension.

• Why do small pieces of camphor dance on the surface of water? 

 Ans. - Due to Surface Tension.

• The iron needle sinks in the water but the ship floats. On what principle is this based?  

Ans. - Archimedes' Theory.

• What is the law of Archimedes related to? 

 Ans. - Rule of Flotation.

• Who propounded the universal law of gravity? 

 Ans. -  Newton.

• Which is the correct value of the gravity of the working earth on a body of 1 Kg mass? 

Ans. -  9.8 N

• How many watts is equal to one horsepower (HP)?

Ans. -  746 watts

• Why does an iron needle float on the surface of water?  

Ans. -  Due to page tension

• At what angle should a ball be thrown horizontally so that it can cover the maximum horizontal distance? 

 Ans. -  45॰.

• Who had told before Newton that all things are gravitated towards Earth? 

Ans. -  Brahmagupta.

• At what angle should a cricket ball be hit to reach the maximum distance?  

Ans. -  45॰ angle to horizontal.

• Heat is a type of energy that can be converted into work. Who gave the first direct evidence of this? 

Ans. -  Rumford.

• Which scientist first rubbed and melted two pieces of ice? 

Ans. -  Davy.

• For what reason can the temperature of boiling water in a steam engine be high?  

Ans. - High pressure inside boiler.

• On what principle is a Thermo Couple Thermometer based?  

Ans. -  On the effect of Seebeck.

• On which principle is the Total Radiation Pyrometer based? 

Ans. -  Stephen's Rule.

• The temperature of distant objects like sun etc. is measured by which thermometer? 

Ans. -  Full Radiation Thermometer.

• At what temperature will the reading be the same in Celsius and Fahrenheit thermometers? 

Ans. -  40॰