PHYSICS - Expected Science Questions for Railways / SSC CGL / CHSL

PHYSICS - Expected Science Questions for Railways / SSC CGL / CHSL

If you are preparing for any competitive exam so you need to take a look on this series. These are the most expected question that you may face in your upcoming exams

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Q. A women’s voice is shriller than a man’s due to
a) Higher amplitude                                                        b) weak vocal chords

c) Higher frequency                                                        d) lower frequency

Ans: c) Higher frequency

Q. A dentist’s mirror is a
a) Concave mirror                                                    b) convex mirror
b) Plane mirror                                                         d) cylindrical mirror

Ans: a) Concave mirror     

Q. Air is completely removed from an electric bulb to prevent
a) Bursting                                                               b) Oxidation of filament  

c) Melting of the filament                                    d) Loss of light due to absorption

Ans: b) Oxidation of filament

Q. A Transformer is a device for?

a)  Stepping up or down voltage                               b) converting AC inverts DC
c) Generating electricity                                           d) converting DC to AC

Ans: a) Stepping Up or down Voltage

Q. The advantage of AC over DC is that

a) It can be transmitted over long distances with minimum power loss

b) Its generation costs much less                               d) Its is free from voltage fluctuation

c) It contains more electric energy

Ans: a) It can be transmitted over long distances with minimum power loss

Q. Curie is a unit of

a) Current                                                                    b) voltage

c) Radioactivity                                                           c) Magnetic field

Ans: c) Radioactivity

Q. Power of lens is measured in
a) Dioptre                                                                    b) joule

c) Joule / second                                                         d) Ampere

Ans: a) Dioptre          
                                                                                                          

Q. An instrument used to measure humidity is called

a) Anemometer                                                           b) hygrometer

b) Thermometer                                                          c) Pyrheliometer

Ans: b) hygrometer

Q. when the mass and speed of a body is doubled, its kinetic energy becomes

a) Half                                                                          b) Quadruple

c) double                                                                      d) eight times 

Ans: d) eight times 

Q. Raindrops are spherical due to
a) Continuous evaporation                                           b) viscosity of water

c) Air friction                                                               d) surface tension

Ans: d) surface tension

Q. speed of sound highest in which medium
a) Water                                                                         b) Air

c) Iron                                                                           d) wood

Ans: c) iron      

Q. Bat can fly in dark because they
a) Have strong waves                                                   b) have sharp eyes

c) Produce ultrasonic waves                                  d) have supersonic vision

Ans: c) Produce ultrasonic waves 
  

Q. A person weigh more in a lift is
a) Acceleration upward                         b) moving up with a constant velocity

c) Moving down with a constant velocity     d) Accelerating downward

Ans: a) Accelerating upwards

Q. When the velocity of a body is doubled, its

a) Momentum is doubled                                               b) energy is doubled

c) Potential energy is doubled                                       d) kinetic energy is doubled

Ans: a) Momentum is doubled       
              

Q. when a ship enters a sea from a river

a) It remains at the same level                                       b) its rises a little

c) it rises or sinks depending on the material                d) it sinks a little

Ans: b) it rises a little

Q. The intensity of an earthquake is measured with a

a) Barometer                                                                  c) hydrometer

c) Polygraph                                                                  d) seismograph

Ans: d) seismograph

Q. which of the following is a semiconductor

a) Silicon                                                                         b) glass
c) Wood                                                                          d) phosphorous                       

Ans:  a) Silicon     

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