set 5 MCQ Questions & Answers Detailed Explanation
MOST IMPORTANT general science mcq - 5 EXERCISES
The following question based on mechanics (mass, force, acceleration, work, energy, momentum, velocity) topic of general science mcq
(a) third law of motion
(b) second law of motion
(c) first law of motion
(d) first, second and third laws of motion
The correct answers to the above question in:
Answer: (a)
Practice mechanics (mass, force, acceleration, work, energy, momentum, velocity) (set 5) Online Quiz
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Read more mechanics work and energy Based General Science Questions and Answers
Question : 1
There is no atmosphere on the moon because
a) escape velocity of gas molecules is greater than their root mean square velocity.
b) it is too for from the sun and has very low pressure in its outer surface.
c) it is closer to the earth and also it has the inactive inert gases in it.
d) escape velocity of gas molecules is less than their root mean square velocity.
Answer »Answer: (d)
Question : 2
Consider the following statements :
- A body can have constant velocity and still have varying speed.
- A body falls freely from a height with uniform acceleration.
a) 1 and 2 both
b) 1 only
c) 2 only
d) None
Answer »Answer: (d)
Earth is not uniform and also rotating, so the free fall acceleration g on the earth differs slightly from the gravitational acceleration ag.
Question : 3
Statement A :
While walking on ice, one should take small steps to avoid slipping.
Statement B :
This is because smaller steps ensure smaller friction.
a) Both statements are correct.
b) Statement B is correct.
c) Statement A is correct.
d) Both statements are incorrect.
Answer »Answer: (c)
Question : 4
SI unit of pressure is
a) pascal
b) bar
c) atmosphere
d) mm of Hg
Answer »Answer: (a)
1 pascal = 1 N / m2.
Question : 5
Match the Column I and Column II.
Column I | Column II |
A. Electric motor | P. Electrical energy to sound energy |
B. Electric bell | Q. Electrical energy to mechanical energy |
C. Electric bulb | R. Light energy to electrical energy |
D. Photoelectric | S. Heat energy to mechanical cell energy |
E. Steam engine | T. Electric energy to light energy |
a) A-Q; B-P; C-T; D-S; E-R
b) A-Q; B-P; C-T; D-T; E-S
c) A-P; B-Q; C-T; D-R; E-S
d) A-Q; B-P; C-T; D-R; E-S
Answer »Answer: (d)
Question : 6
The work done becomes zero if
a) force acting on the body is zero
b) displacement is zero
c) force perpendicular to the displacement
d) All of the above
Answer »Answer: (d)
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