GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 087

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 087

861). A loudspeaker converts
A). electrical energy into sound energy
B). sound energy into electrical energy
C). small sound into a large sound
D). none of the above

Answer: electrical energy into sound energy


   
862). The transverse wave nature of light was proved by
A). interference
B). diffraction
C). polarisation
D). refraction

Answer: polarisation


   
863). Electric iron takes a long time to cool because of
A). greater emissivity
B). lesser emissivity
C). less absorptive power
D). more absorptive power

Answer: lesser emissivity


   
864). Density of the matter is defined as
A). mass / volume
B). mass x volume
C). volume / mass
D). none of these

Answer: mass / volume


   
865). The resultant upthrust on a body partly immersed in liquid acts through
A). the centre of gravity
B). the metacentre
C). the centre of pressure
D). none of these

Answer: the centre of gravity



866). A transverse wave travel along z-axis. The particles of the medium must move along
A). z axis
B). x axis
C). y axis
D). in x-y plane

Answer: in x-y plane


   
867). Joule-Thomson cooling is
A). temperature dependent
B). temperature independent
C). dependent on the molecular weight of the gas
D). dependent on the total mass of the gas

Answer: temperature dependent


   
868). The principle of action of points is used in
A). capacitors
B). inductors
C). resistors
D). lightning arresters

Answer: lightning arresters


   
869). A jet engine works under the principle of
A). mass
B). energy
C). linear momentum
D). angular momentum

Answer: linear momentum


   
870). To find the temperature following law is used
A). Charles law
B). Stefan's fourth power law of radiation
C). Boyle's law
D). Kirchhoff's law

Answer: Stefan's fourth power law of radiation