Science
Q.1-How the fuse is connected in an electric circuit?
Ans-Series With Live.
Q.2- Hydraulic brakes in automobile work on which principle ?
Ans-Pascals principle.
Q.3-Solar energy is produced by which reaction on Sun ?
Ans-Nuclear fusion reaction.
Q.4-Transformer is an electrical device which is used to...?
Ans-Stepup & Stepdown the AC voltage.
Q.5- Fuse wire is made of an alloy of which element ?
Ans-Tin and Lead.
Q.6- What is the frequency of direct current?
Ans-Zero.
Q.7- When we see an object, the image formed on the retina of our eye is..?
Ans- Real And Inverted.
Q.8- The spring balance works on which principle ?
Ans- Hooke's Law.
Q.9-Which phenomenon is responsible for the echo of sound wave?
Ans- Reflection.
Q.10- Why Water is used in a hot water bag?
Ans- Because Water Has High Specific Heat.
Q.11- In the absence of the earth's atmosphere, sky would appear ?
Ans- Black.
Q.12- What is the working principle of washing machine ?
Ans- Centrifugation.
Q.13- Name the device which is used to convert alternating current into direct current?
Ans- Rectifier.
Q.14- What is the unit of Astronomical Distance?
Ans- Parsec.
Q.15- cooling by a desert Cooler is based on which principle ?
Ans- Evaporative Cooling.
Q.16- For which purpose Diodes are generally used for?
Rectification.
Q.17- The redness in atmosphere at Sunrise and Sunset is due to which phenomenon ?
Ans- Scattering Of Light.
Q.18- The phenomenon of change in direction of light when it passes from one medium to another is called...?
Ans- Refraction Of Light.
Q.19- Intensity ratioiof waves is 25:9. What is the ratio of their amplitudes?
Ans-5:3
Q.20- Why the choke in a fluorescent lamp is used ?
Ans- Decrease The Current Flow.
Q.21- Which colour of light deviates least through the Prism ?
Ans- Red.
Q.22- The splitting of white light into different light is called...?
Ans- Dispersion Of Light.
Q.23- Tesla is a unit of which quantity ?
Ans- Magnetic Induction or Magnetic Flux Density.
Q.24- By which principle when the milk is churned vigorously the cream from it is separated out ?
Ans- Centrifugal Force
Q.25- Dioptere is the unit of which Quantity ?
Ans- Power Of A Lens.
Q.26- In a filament type light bulb most of the electric power consumed appears as ?
Ans- Infra-Red Rays.
Q.27- When two semiconductors of P and N type are brought in contact, they forrm P-N junction which acts as?
Ans- Rectifier.
Q.28- Ohm's law is valid for which type of material ?
Ans- Conductor.
Q.29- At which temperature Value of Centigrade and Fahrenheit are same value ?
Ans- 40 Degree.
Q.30- Why Steel is more elastic than rubber
Ans- Because it is deformed very easily.
Q.31- In radio-communication, the signals emitted by transmitting antenna are reflected by which layer of atmosphere ?
Ans- lonosphere.
Q.32- Why the Outside surface of cooking utensils are generally left black?
Ans- Because black surface is a good absorber of heat.
Q.33- Photon is the fundamental unit of whirh Quantity ?
Ans- Light.
Q.34- Vegetables are cooked in lesser time by adding a pinch of salt while cooking because..?
Ans- Boiling point of water increases.
Q.35- What is the unit of relative density?
Ans- It has no unit.
Q.36- One nanometer is equal to how much Meters ?
Ans- 10^(-9)
Q.37- The group of solar cells joined together in a definite pattern is called ?
Ans- Solar cell panel.
Q.38- What is the reverse effect of XRay emission is called?
Ans- Photoelectric Effect.
Q.39- Quality of a musical note depends on..?
Ans- Harmonics present.
Q.40- Why the copper wires are generally used for electrical power transmission instead of iron wire ?
Ans- Copper is a betler conductor of electricity than iron.
Q.41-On a cold day the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature ?
Ans- Because metals are good conductors of heat.
Q.42- Electromagnet is constructed by which material ?
Ans- Soft Iron.
Q.43- Which mirror used in motor vehicles near the driver's seat?
Ans- Convex Mirror.
Q.44- The filament of an electric bulb is made of which metal
Ans- Tungsten.
Q.45- Where the value of g (acceleration due to gravity) is maximum?
Ans- At poles
Q.46- Every hot object emits which radiation?
Ans- Infrared rays
Q.47- Name the force which makes a vehicle to stop when Break is applied is called ...?
Ans- frictional force
Q.48- Flemings Left hand Rule is assoçiated with the effect of..?
Ans- Magnetic Field on current
Q.49- At which point where total mass of a body is concentrated is known as ?
Ans- Centre of mass
Q.50- What is the total number of basic S.I units ?
Ans- Seven (7)
Q.51- Why the colour of the ocean appears to be blue ?
Ans- Due to scattering of light
Q.52- Where electrical charges reside in a charged conductor ?
Ans- Outer Surface Of The Body.
Q.53- In the visible spectrum which colour has the shortest wavelength ?
Ans- Violet.
Q.54- What is the unit of specific resistance?
Ans- Ohm metre.
Q.55- What is used as moderator in nuclear reactor?
Ans- Graphite.
Q.56- How the galvanometer can be converted to a voltmeter
Ans- By Connecting a high resistance in series.
Q.57- If ice floating on water in a vessel melts, the water level in the Vessel will be..?
Ans- Does not change
Q.58- If a bar magnet is cut length wise into 3 parts, what will the total number of poles be?
Ans- 6
Q.59- Light travels in a_?
Ans- Straight line
Q.60- Nucleus of an atom consistof ...?
Ans- Neutrons and protons
Q.61- One barrel of oil approximately equal to how much litre ?
Ans- 159 litres
Q.62- Which instrument is used to measure depth of ocean ?
Ans- Fathometer
Q.63- Name the strongest force in the nature ?
Ans- Nuclear Force
Q.64- In which medium sound travels faster?
Ans- Solid
Q.65- Why does a liquid drop tend to assume a spherical shape?
Ans- To minimize surface tension
Q.66- The direction of a magnetic field, within a magnet is...?
Ans- From South to north
Q.67- Phenomenon of total internal reflection can occur when light pass from ?
Ans- Denser to Rarer medium
Q.68- Electric Motor converts?
Ans- Electric energy to hiechanical energy
Q.69- Nuclear sizes are expressed in which unit ?
Ans- Fermi
Q.70- Which device is used to measure the temperature of the sun?
Ans- Pyrometer
Q.71- Sudden fall in reading of barometer is an indication of ?
Ans- Storm
Q.72- What type of lens is used to correct vision of a person suffering from Myopia ?
Ans- Concave lens
Q.73- Which material is used in electric heater ?
Ans- Nichrome
Q.74- Addition of suitable impurities into semiconductor is called?
Ans- Doping
Q.75- Why are Metals are good conductor of heat and electricity?
Ans-they contain free electrons
Q.76- Nuclear fission reaction is started by impact of .?
Ans- Neutrons
Q.77- On which principle transformer works?
Ans- Mutual Induction
Q.78- Which instrument is used to measure altitudes in aircrafts?
Ans- Altimeter
Q.79- Intensity of any wave is proportional to ..?
Ans- Square of amplitude
Q.80- The commonly used coolant in refrigerators is ... ?
Ans- Freon
Q.81- What is the unit of measurement of noise ?
Ans- Decibel
Q.82- Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules is called ?
Ans- Convection
Q.83- Choke used in a tube light is basically ..?
Ans- An Inductor
Q.84- Boiling point of water depends on...?
Ans- Atmospheric Pressure
Q.85- When a ship enters the sea from a river what will be the effect on ship?
Ans- It rises a little
Q.86- What is indicated by the colour of a star ?
Ans- Temperature
Q.87- Hertz is a unit for measuring the .?
Ans- Frequency of waves
Q.88- Fuse wire made of which type of material ?
Ans- Low resistance and low melting point
Q.89- A bomb explodes on the moon we hear its sound on earth after how much time?
Ans- We cannot hear the sound of explosion
Q.90- Why the sun Sun appears red in colour at sunrise and sunset ?
Ans- Because all other colours scatter away except red
Q.91- Conversion of chemical energy into electrical energy occurs in ...?
Ans- Battery
Q.92- Working of atom bomb is based on the principle of ?
Ans-Nuclear Fission
Q.93- On which principle the signal is transmitted in optical fibre ?
Ans- due to total internal reflection
Q.94 0°K is equivalent to..?
Ans. - 273°C
Q.95- The least distance of distinct vision of human eye is ?
Ans- 25 cm
Q.96- Which phenomenon established the transverse nature of light ?
Ans- Polarisation
Q.97- Which apparatus is used to locate a submerged object-
Ans- SONAR
Q.98- If electric resistance is to be decreased, then the number of resistances should be connected in ?
Ans- Parallel
Q.99- A galvanometer can be converted into a voltmeter by connecting with ...?
Ans- High resistance on series
Q.100- The mercury and sodium street lamps light up because of ?
Ans- Atomic emissionc
Q.1-How the fuse is connected in an electric circuit?
Ans-Series With Live.
Q.2- Hydraulic brakes in automobile work on which principle ?
Ans-Pascals principle.
Q.3-Solar energy is produced by which reaction on Sun ?
Ans-Nuclear fusion reaction.
Q.4-Transformer is an electrical device which is used to...?
Ans-Stepup & Stepdown the AC voltage.
Q.5- Fuse wire is made of an alloy of which element ?
Ans-Tin and Lead.
Q.6- What is the frequency of direct current?
Ans-Zero.
Q.7- When we see an object, the image formed on the retina of our eye is..?
Ans- Real And Inverted.
Q.8- The spring balance works on which principle ?
Ans- Hooke's Law.
Q.9-Which phenomenon is responsible for the echo of sound wave?
Ans- Reflection.
Q.10- Why Water is used in a hot water bag?
Ans- Because Water Has High Specific Heat.
Q.11- In the absence of the earth's atmosphere, sky would appear ?
Ans- Black.
Q.12- What is the working principle of washing machine ?
Ans- Centrifugation.
Q.13- Name the device which is used to convert alternating current into direct current?
Ans- Rectifier.
Q.14- What is the unit of Astronomical Distance?
Ans- Parsec.
Q.15- cooling by a desert Cooler is based on which principle ?
Ans- Evaporative Cooling.
Q.16- For which purpose Diodes are generally used for?
Rectification.
Q.17- The redness in atmosphere at Sunrise and Sunset is due to which phenomenon ?
Ans- Scattering Of Light.
Q.18- The phenomenon of change in direction of light when it passes from one medium to another is called...?
Ans- Refraction Of Light.
Q.19- Intensity ratioiof waves is 25:9. What is the ratio of their amplitudes?
Ans-5:3
Q.20- Why the choke in a fluorescent lamp is used ?
Ans- Decrease The Current Flow.
Q.21- Which colour of light deviates least through the Prism ?
Ans- Red.
Q.22- The splitting of white light into different light is called...?
Ans- Dispersion Of Light.
Q.23- Tesla is a unit of which quantity ?
Ans- Magnetic Induction or Magnetic Flux Density.
Q.24- By which principle when the milk is churned vigorously the cream from it is separated out ?
Ans- Centrifugal Force
Q.25- Dioptere is the unit of which Quantity ?
Ans- Power Of A Lens.
Q.26- In a filament type light bulb most of the electric power consumed appears as ?
Ans- Infra-Red Rays.
Q.27- When two semiconductors of P and N type are brought in contact, they forrm P-N junction which acts as?
Ans- Rectifier.
Q.28- Ohm's law is valid for which type of material ?
Ans- Conductor.
Q.29- At which temperature Value of Centigrade and Fahrenheit are same value ?
Ans- 40 Degree.
Q.30- Why Steel is more elastic than rubber
Ans- Because it is deformed very easily.
Q.31- In radio-communication, the signals emitted by transmitting antenna are reflected by which layer of atmosphere ?
Ans- lonosphere.
Q.32- Why the Outside surface of cooking utensils are generally left black?
Ans- Because black surface is a good absorber of heat.
Q.33- Photon is the fundamental unit of whirh Quantity ?
Ans- Light.
Q.34- Vegetables are cooked in lesser time by adding a pinch of salt while cooking because..?
Ans- Boiling point of water increases.
Q.35- What is the unit of relative density?
Ans- It has no unit.
Q.36- One nanometer is equal to how much Meters ?
Ans- 10^(-9)
Q.37- The group of solar cells joined together in a definite pattern is called ?
Ans- Solar cell panel.
Q.38- What is the reverse effect of XRay emission is called?
Ans- Photoelectric Effect.
Q.39- Quality of a musical note depends on..?
Ans- Harmonics present.
Q.40- Why the copper wires are generally used for electrical power transmission instead of iron wire ?
Ans- Copper is a betler conductor of electricity than iron.
Q.41-On a cold day the metallic cap of a pen becomes much colder than its plastic body, though both are at the same temperature ?
Ans- Because metals are good conductors of heat.
Q.42- Electromagnet is constructed by which material ?
Ans- Soft Iron.
Q.43- Which mirror used in motor vehicles near the driver's seat?
Ans- Convex Mirror.
Q.44- The filament of an electric bulb is made of which metal
Ans- Tungsten.
Q.45- Where the value of g (acceleration due to gravity) is maximum?
Ans- At poles
Q.46- Every hot object emits which radiation?
Ans- Infrared rays
Q.47- Name the force which makes a vehicle to stop when Break is applied is called ...?
Ans- frictional force
Q.48- Flemings Left hand Rule is assoçiated with the effect of..?
Ans- Magnetic Field on current
Q.49- At which point where total mass of a body is concentrated is known as ?
Ans- Centre of mass
Q.50- What is the total number of basic S.I units ?
Ans- Seven (7)
Q.51- Why the colour of the ocean appears to be blue ?
Ans- Due to scattering of light
Q.52- Where electrical charges reside in a charged conductor ?
Ans- Outer Surface Of The Body.
Q.53- In the visible spectrum which colour has the shortest wavelength ?
Ans- Violet.
Q.54- What is the unit of specific resistance?
Ans- Ohm metre.
Q.55- What is used as moderator in nuclear reactor?
Ans- Graphite.
Q.56- How the galvanometer can be converted to a voltmeter
Ans- By Connecting a high resistance in series.
Q.57- If ice floating on water in a vessel melts, the water level in the Vessel will be..?
Ans- Does not change
Q.58- If a bar magnet is cut length wise into 3 parts, what will the total number of poles be?
Ans- 6
Q.59- Light travels in a_?
Ans- Straight line
Q.60- Nucleus of an atom consistof ...?
Ans- Neutrons and protons
Q.61- One barrel of oil approximately equal to how much litre ?
Ans- 159 litres
Q.62- Which instrument is used to measure depth of ocean ?
Ans- Fathometer
Q.63- Name the strongest force in the nature ?
Ans- Nuclear Force
Q.64- In which medium sound travels faster?
Ans- Solid
Q.65- Why does a liquid drop tend to assume a spherical shape?
Ans- To minimize surface tension
Q.66- The direction of a magnetic field, within a magnet is...?
Ans- From South to north
Q.67- Phenomenon of total internal reflection can occur when light pass from ?
Ans- Denser to Rarer medium
Q.68- Electric Motor converts?
Ans- Electric energy to hiechanical energy
Q.69- Nuclear sizes are expressed in which unit ?
Ans- Fermi
Q.70- Which device is used to measure the temperature of the sun?
Ans- Pyrometer
Q.71- Sudden fall in reading of barometer is an indication of ?
Ans- Storm
Q.72- What type of lens is used to correct vision of a person suffering from Myopia ?
Ans- Concave lens
Q.73- Which material is used in electric heater ?
Ans- Nichrome
Q.74- Addition of suitable impurities into semiconductor is called?
Ans- Doping
Q.75- Why are Metals are good conductor of heat and electricity?
Ans-they contain free electrons
Q.76- Nuclear fission reaction is started by impact of .?
Ans- Neutrons
Q.77- On which principle transformer works?
Ans- Mutual Induction
Q.78- Which instrument is used to measure altitudes in aircrafts?
Ans- Altimeter
Q.79- Intensity of any wave is proportional to ..?
Ans- Square of amplitude
Q.80- The commonly used coolant in refrigerators is ... ?
Ans- Freon
Q.81- What is the unit of measurement of noise ?
Ans- Decibel
Q.82- Heat is transmitted from higher temperature to lower temperature through the actual motion of the molecules is called ?
Ans- Convection
Q.83- Choke used in a tube light is basically ..?
Ans- An Inductor
Q.84- Boiling point of water depends on...?
Ans- Atmospheric Pressure
Q.85- When a ship enters the sea from a river what will be the effect on ship?
Ans- It rises a little
Q.86- What is indicated by the colour of a star ?
Ans- Temperature
Q.87- Hertz is a unit for measuring the .?
Ans- Frequency of waves
Q.88- Fuse wire made of which type of material ?
Ans- Low resistance and low melting point
Q.89- A bomb explodes on the moon we hear its sound on earth after how much time?
Ans- We cannot hear the sound of explosion
Q.90- Why the sun Sun appears red in colour at sunrise and sunset ?
Ans- Because all other colours scatter away except red
Q.91- Conversion of chemical energy into electrical energy occurs in ...?
Ans- Battery
Q.92- Working of atom bomb is based on the principle of ?
Ans-Nuclear Fission
Q.93- On which principle the signal is transmitted in optical fibre ?
Ans- due to total internal reflection
Q.94 0°K is equivalent to..?
Ans. - 273°C
Q.95- The least distance of distinct vision of human eye is ?
Ans- 25 cm
Q.96- Which phenomenon established the transverse nature of light ?
Ans- Polarisation
Q.97- Which apparatus is used to locate a submerged object-
Ans- SONAR
Q.98- If electric resistance is to be decreased, then the number of resistances should be connected in ?
Ans- Parallel
Q.99- A galvanometer can be converted into a voltmeter by connecting with ...?
Ans- High resistance on series
Q.100- The mercury and sodium street lamps light up because of ?
Ans- Atomic emissionc
Science Gk Top 100 Questions 2022-24
![Science Gk Top 100 Questions 2022-24]()
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October 10, 2019
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