10 Important General Science MCQs for most of the competitive exams
Que 1: Assuming the earth to be a sphere of uniform mass density, how much would body weight half way down to the centre of earth if it weighed 250 N on the surface ?
(A) 175 N
(B) 125 N
(C) 150 N
(D) 200 N
Correct Ans: B
Que 2: Electric Potential is :
(A) Vector and dimensionless quantity
(B) Scalar and dimensional quantity
(C) Vector and dimensional quantity
(D) Scalar and dimensionless quantity
Correct Ans: B
Que 3: A gold leaf electroscope is charged and the leaves are observed to diverge by a certain amount. The beam of X-rays is allowed to fall upon the electroscope for a short period. The effect is as follows :
(A) The golf leaves will melt
(B) The leaves will diverge further
(C) There will be no change in the divergence
(D) The leaves will collapse
Correct Ans: D
Que 4: The time period of a satellite revolving in a circular path of radius R is T. the time period of the satellite of radius 9 R will be :
(A) T
(B) 9T
(C) 27T
(D) T/9
Correct Ans: C
Que 5: Conduction, is the process of heat transfer in which :
(A) Heated molecules move from hotter to colder region
(B) A heated fluid flows from heated to colder region
(C) Wave travels from heated to colder region
(D) Heat passes from one particle to other as a result of increased vibration.
Correct Ans: D
Que 6: Two coils placed close to each other. The mutual inductance of the pair of coils depends upon :
(A) The rates at which current are changing in the two coils
(B) Relative position and orientation of the two coils
(C) The materials of the wires of the coils
(D) The currents in the two coils
Correct Ans: B
Que 7: The normal temperature of the human body on the Kelvin scale is :
(A) 241 K
(B) 310.05 K
(C) 371.4 K
(D) 309.15 K
Correct Ans: B
Que 8: The best conductor of electricity is
(A) Filter hot water
(B) Distilled water
(C) Filtered water at room temperature
(D) Salt water
Correct Ans: D
Que 9: Two cars passing each other at high speed are in danger of side swiping because
(A) Of the increase in air pressure in the space between them
(B) Of decrease in the velocity of air molecules between them
(C) Of decrease in air pressure in the space between them
(D) Increase in the velocity of air molecules between them
Correct Ans: C
Que 10: In myopia, we can not see -
(A) Distant objects
(B) Nearer objects
(C) Both of these
(D) Non of these
Correct Ans: A
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