GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 125

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 125

1241). The propagation of light through optical fibres is based on
A). diffraction
B). refraction
C). total internal reflection
D). reflection

Answer: total internal reflection


   
1242). A disadvantage of the laser printer is
A). it is quieter than an impact printer
B). the output is of a lower quality
C). it is very slow
D). none of these

Answer: none of these


   
1243). Nuclei with equal number of neutrons are
A). isotopes
B). isobars
C). isomers
D). isotones

Answer: isotones


   
1244). The bifocal lens was invented by
A). Galileo
B). Benjamin Franklin
C). Snell
D). Alessandro volta

Answer: Benjamin Franklin


   
1245). When oil is poured on the surface of water surface tension
A). increases
B). decreases
C). remains constant
D). increases first and then decreases

Answer: decreases



1246). A blotting paper absorbs ink because of
A). surface tension
B). viscosity
C). cohesive force
D). capillary action

Answer: capillary action


   
1247). X-ray cannot pass through
A). glass
B). gold
C). carbon
D). oxygen

Answer: gold


   
1248). A generator is a device which converts
A). electrical energy into mechanical energy
B). electrical energy into light energy
C). mechanical energy into electrical energy
D). magnetic energy into electrical energy

Answer: mechanical energy into electrical energy


   
1249). Klystron produces
A). gamma rays
B). infrared rays
C). radiowaves
D). microwaves

Answer: microwaves


   
1250). The S.I. unit
A). metre
B). dioptre
C). watt
D). calorie

Answer: dioptre