GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 068

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 068

671). A transformer
A). transforms energy
B). transforms frequency
C). transforms voltage
D). generates e.m.f.

Answer: transforms voltage


   
672). In general, when the temperature of a metal is raised, its conductance
A). increases
B). decreases
C). remains the same
D). first decreases then increases

Answer: decreases

   
673). "1 Kilowatt hour" is the unit of
A). energy
B). power
C). charge
D). current

Answer: energy

   
674). Electromagnetic radiations are given out due to
A). jumping of electrons from low energy level to high energy level
B). jumping of electrons from high energy level to low energy level
C). revolution of electrons in specified orbits
D). none of these

Answer: none of these


   
675). One of the following is used for satellite communication?
A). radio waves
B). micro waves
C). light waves
D). all of these

Answer: micro waves



676). Arrange in descending order of wave length (long to short) 

I. Infra red II. Ultra violet III. Gamma rays IV. Micro waves 

The correct order is
A). IV, I, II, III
B). I, IV, II, III
C). I, II, III IV
D). III, II I, IV

Answer: IV, I, II, III


   
677). Match list I with list II correctly and select your answer using the codes given below :
List I                                       List II
a) lonosphere                        1) Volta
b) Black holes                       2) S. Chandrasekar
c) Electric battery                  3) E.V. Appleton
d) Electromagnetic waves      4) Hertz

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

Answer: 3 2 1 4


   
678). Consider the following statements :
Assertion (A) : Ultrasonic waves are used for finding molecular structure 

Reason (R) : Chemical effects are produced by ultrasonic waves. Now select your answer according to the coding scheme given below :
A). (A) is correct, but (R) is wrong
B). (A) and (R) are correct
C). (A) is wrong, but (R) is correct
D). Both are wrong

Answer: (A) is correct, but (R) is wrong


   
679). The colour of outer edge of rainbow will be
A). purple
B). red
C). violet
D). yellow

Answer: red


   
680). When seen through a piece of red glass the green leaves will appear
A). almost black
B). nearly visible
C). natural green colour
D). bluish tint

Answer: bluish tint