GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 065

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 065

641). In mountains because the atmospheric pressure is low, the boiling point of water
A). decreases
B). increases
C). may increase or decrease
D). remains the same

Answer: decreases


   
642). By centrifugal action we can separate particles of different
A). colours
B). densities
C). masses
D). sizes

Answer: densities


   
643). Match list I with list II correctly and select your answer using the codes given below :
List I                                            List II
a) Anemometer                   1) Speed of rotation
b) Ammeter                        2) High temperature
c) Tachometer                    3) Wind speed
d) Pyrometer                      4) Electric current
                                         5) Pressure difference

Below codes are given in A B C D order
A). 3 5 2 1
B). 3 4 1 2
C). 4 3 1 5
D). 1 4 3 2

Answer: 3 4 1 2

   
644). Consider the following statements:
Assertion (A) : Diffraction of sound waves is more evident than that of light waves. 

Reason (R) : Sound waves are longitudinal and light waves are transverse. of the statements :
A). Both (A) and (R) are true, and (R) is the correct explanation of (A)
B). Both (A) and (R) are true, but (R) is not the correct explanation of (A)
C). (A) is correct, but (R) is incorrect
D). (A) is incorrect, but (R) is correct

Answer: Both (A) and (R) are true, but (R) is not the correct explanation of (A)


   
645). Raman effect is due to
A). scattering of light
B). total internal reflection
C). dispersion effect
D). interference of light

Answer: scattering of light



646). A diamond shines brightly because it has
A). low refractive index and low critical angle
B). low refractive index and high critical angle
C). high refractive index and low critical angle
D). high refractive index and high critical angle

Answer: high refractive index and low critical angle


   
647). Water in a lake and nearby wells seeks the same level because of
A). anomalous expansion of water
B). surface tension of water
C). force of gravity
D). the same atmospheric pressure

Answer: force of gravity


   
648). The base of an electric iron is highly polished mainly to
A). make it smooth-and friction less
B). make it rush proof
C). reduce heat loss by radiation
D). make it more durable

Answer: reduce heat loss by radiation


   
649). Electronic devices that convert D.C. power into A.C. power are called
A). converters
B). transformers
C). inverters
D). rectifiers

Answer: inverters


   
650). The heating element in an electric stove is made of
A). copper
B). platinum
C). nichrome
D). tungsten

Answer: nichrome