GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 057

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 057

561). The most basic of all test instruments is the
A). multimeter
B). ohmmeter
C). cathode ray oscilloscope
D). galvanometer

Answer: galvanometer


   
562). The energy gap of a diamond is
A). 1 eV
B). 2 eV
C). 10 eV
D). 7 eV

Answer: 7 eV


   
563). The positron is called the antiparticle of the electron, because it
A). has opposite charge
B). has same mass
C). annihilates with an electron
D). collides with an electron

Answer: has opposite charge


   
564). The radioactive decay follows
A). N=Noe^at
B). N=Noe^at2
C). N=Noe^-at
D). N=Noe^-a2t

Answer: N=Noe^-at



   
565). Gamma -rays can be detected by passing them through
A). electric field
B). magnetic field
C). electric and magnetic fields
D). scintillation counter

Answer: scintillation counter



566). Magnetron is used for the production of
A). X rays
B). Cathode rays
C). Microwaves
D). Positive rays

Answer: Microwaves


   
567). The intensity of an earthquake is measured with a
A). Barometer
B). Hydrometer
C). Polygraph
D). Seismograph

Answer: Seismograph


   
568). Which of the following functions is performed by a photo - cell?
A). it converts magnetic energy into electrical energy
B). it converts chemical energy into electrical energy
C). it converts electrical energy into light energy
D). it converts light energy into electrical energy

Answer: it converts light energy into electrical energy


   
569). Alternating current is converted into direct current by
A). dynamo
B). transformer
C). rectifier
D). motor

Answer: rectifier


   
570). The fuse wire is made of
A). copper
B). tungsten
C). nichrome
D). lead-tin alloy

Answer: lead-tin alloy