300 Physics questions MCQ for SSC

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300 Physics questions and Answers MCQ for SSC / UPSC / PSC / UGC NET/ SET/ for All Competitive Exams Practice Online free

 

16 .Alternating current is converted into direct current by a
A.  transformer
B.  dynamo
C.  oscillator
D.  rectifier
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17 .On which of the following techniques photo statemachine works ?
A.  Magnetic Imager Making
B.  Thermal Image Making
C.  Electrostatic Image Making
D.  Electromagnetic Image Making
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18 .Which of the following produces more severe bums ?
A.  Boiling water
B.  Hot water
C.  Steam
D.  Melting iceberg
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19 .The swing of a spinning cricket ball in air can beexplained on the basis of
A.  Sudden change in wind direction.
B.  Buoyancy of air.
C.  Turbulence caused by wind.
D.  Bernoulli's theorem.
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20 .In the process of magnetization of a bar
A.  The entire bulk of the bar gets magnetised
B.  Only the surface of the bar gets magnetised
C.  Only the ends of the bar get magnetised
D.  Only some parts of the outer layers of the bar getmagnetized
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21 .The earth wire of a cable is connected to
A.  the outer metallic body of the appliance
B.  the fuse of the appliance
C.  the filament of the appliance
D.  short circuitry of the appliance
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22 .Short sight in human eye can be corrected by usingproper
A.  convex lens
B.  concave lens
C.  cylindrical lens
D.  bifocal lens
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23 .A simple microscope consists of
A.  a short focus convex lens
B.  a long focus convex lens
C.  a short focus concave lens
D.  a long focus concave lens
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24 .Which set of conditions represents the easiest way toliquify a gas ?
A.  Low temperature and high pressure
B.  High temperature and low pressure
C.  Low temperature and low pressure
D.  High temperature and high pressure
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25 .Q125.The type of mirrors used in the headlamp of cars is
A.  parabolic concave
B.  plane
C.  spherical convex
D.  cylindrical concave
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26 .A dynamo is a device which
A.  creates mechanical energy
B.  creates electrical energy
C.  converts mechanical energy into electrical energy
D.  converts electrical energy into mechanical energy
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27 .It is dangerous to observe Solar eclipse with naked eyesbecause
A.  Infrared radiations from sun burn our retina
B.  Ultraviolet radiations from Sun bum our retina
C.  All radiations from sun initiate chemical reactions ineyes
D.  Cosmic rays reach eyes more during the eclipse .
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28 .Newtons first law of motion gives the concept of
A.  energy
B.  work
C.  momentum
D.  inertia
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29 .Which of the following is used in oven ?
A.  X-rays
B.  UV rays
C.  Microwaves
D.  Radio waves
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30 .A person is hurt on kicking a stone due to
A.  Inertia
B.  Velocity
C.  Reaction
D.  Momentum
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