GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 115

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 115

1141). In a good transformer the iron core gets heated after constant use. This heating is most probably due to
A). Eddy current
B). Joule effect
C). Peltier effect
D). Hysteresis

Answer: Joule effect


   
1142). The quantity which cannot be measured by P.O. Box is
A). magnetic field intensity
B). resistance
C). internal resistance
D). resistance of a galvanometer

Answer: resistance of a galvanometer


   
1143). Highest energy electrons will be produced by
A). visible light
B). ultraviolet light
C). X-rays
D). gamma rays

Answer: X-rays


   
1144). According to stefan's law the total energy emitted by a black body is proportional to
A). T
B). T^2
C). T^3
D). T^4

Answer: T^3



   
1145). The principle of meter-bridge is based on
A). Newton's law
B). Gauss's law
C). Wheatstone's law
D). Ampere's law

Answer: Wheatstone's law



1146). Semiconducting property of silicon is due to
A). its positive temperature coefficient of resistance
B). its negative temperature coefficient of resistance
C). wide band gap
D). narrow band gap

Answer: narrow band gap


   
1147). Light from the sun reaches the earth in
A). 45 minute
B). 8 minute
C). 4 minute
D). 2 minute

Answer: 8 minute


   
1148). Which of the following is used in electric heaters and irons?
A). Tungsten
B). Steel
C). Copper
D). Nichrome

Answer: Nichrome


   
1149). Which one of the following instruments is used to measure the speed of water through a pipe?
A). McLeod gauge
B). Pressure gauge
C). Screw gauge
D). Venturimeter

Answer: Venturimeter


   
1150). The distance of stars is measured by the unit
A). kilometre (km)
B). angstrom (A) unit
C). light year
D). giga metre

Answer: light year