GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 076

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 076

751). Photometers are instruments used to measure
A). thermal radiations
B). electrical intensity
C). intensity comparison between different light sources
D). distances

Answer: intensity comparison between different light sources


   
752). Rays from the head light of a car is rendered parallel by
A). concave mirror behind the light
B). concave lens in front on the light
C). concave mirror in front of the light
D). convex mirror behind the light

Answer: concave lens in front on the light


   
753). The diameter of the aperture of a cameras doupled.To compensate this the aperture time in shutter should be
A). doubled
B). made 4 times
C). made 1/2
D). made 1/4

Answer: made 1/2



   
754). Excited atoms gives rise to _______ spectrum
A). absorption
B). continuous
C). line
D). raman

Answer: line


   
755). The wheel of a forward moving vehicle has 8 supporting spokes. It is photographed on a motion picture film which runs at a speed of 24 films per second. The wheel appears to be in the film, if the speed of rotation/sec of the wheel is
A). 1
B). 3
C). 4
D). 1/3

Answer: 3



756). Laser is a device to produce
A). magnetic waves
B). micro waves
C). coherent waves
D). x-rays

Answer: coherent waves


   
757). Transfer of heat by molecular collision
A). collimation
B). conduction
C). convection
D). radiation

Answer: conduction


   
758). The specific volume of water is minimum
A). 2∘ C
B). 0∘ C
C). 4∘ C
D). 273∘ C

Answer: 4∘ C


   
759). In an isothermal process which quantity remains constant?
A). volume
B). pressure
C). temperature
D). energy

Answer: temperature


   
760). Electron - volt is a unit to measure
A). voltage
B). energy
C). charge
D). momentum

Answer: energy