GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 079

GENERAL SCIENCE PHYSICS ONE LINERS FOR TNPSC UPSC SSC SET 079

781). Silicon is a
A). conductor
B). insulator
C). semiconductor
D). metal

Answer: semiconductor


   
782). For satellite communication, we use
A). radio waves
B). micro waves
C). infrared rays
D). ultraviolet rays

Answer: micro waves

   
783). Match list I with list II correctly and select your answer using the codes given below :
List I                                                            List II
a) Radium                                          l) Roentgen
b) X - ray                                          2) Alexander Flemming
c) Penicillin                                        3) Einstein
d) Theory of Relativity                         4) Madam Curie

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

Answer: 4 1 2 3


   
784). Electric current is the flow of
A). atoms
B). free electrons
C). valence electrons
D). molecules

Answer: free electrons


   
785). The mass of an electron is
A). 9.11×10^−28 gm
B). 1.6×10^−20 gm
C). 6.625×10^−27 gm
D). 3×10^−10 gm

Answer: 9.11×10^−28 gm



786). Which one of the following lenses should be used to correct the defect of short sightedness?
A). plano - concave lens
B). double concave lens
C). concave lens
D). convex lens

Answer: concave lens

   
787). Food is cooked quickly in a pressure cooker because
A). boiling point of water decreases
B). boiling point of water increases
C). it absorbs heat quickly
D). it retains heat for a longer time

Answer: boiling point of water increases


   
788). The relation between celsius scale, Fahrenheit scale and reaumur scale of temperature is
A). C/5=(F−32)/9=R/4
B). C/5=F/9=R/4
C). (C+32)/5=F/9=R/4
D). C/5=F/9=(R+32)/4

Answer: C/5=(F−32)/9=R/4



   
789). The unit of surface tension is
A). N/m
B). N/m^2
C). N/× m
D). N/× m^2

Answer: N/m


   
790). The unit a
A). kilowatt
B). kilowatt - hour
C). newton
D). joule

Answer: kilowatt