Practice Tip: Select any option to check your answer. Green indicates correct, Red indicates incorrect.
Test Your Knowledge with MCQs & PYQs
1.
Which of the following statements is true ?(RRC Group D PYQ)
- A.The Mass and Weight of the body remain the same in different places.
- B.The Mass of a body remains same while the Weight changes from place to place.
- C.The Mass and weight of a body change from place to place.
- D.The Mass of a body changes from place to place while the Weight remains the same.
Answer: Option B
2.
The fundamental unit which is common in CGS and SI system is(BSNL JE PYQ)
- A.Second
- B.Kilogram
- C.Gram
- D.Metre
Answer: Option A
3.
The base SI unit of the amount of substance is represented by:(SSC JE PYQ)
- A.s
- B.cd
- C.K
- D.mol
Answer: Option D
4.
Parsec is a unit of _____.(SSC CGL PYQ)
- A.speed
- B.acceleration
- C.length
- D.time
Answer: Option C
5.
What is the maximum amount of work done in 10 s by a 20 kW engine ?(RRC Group D PYQ)
- A.20 KJ
- B.200 KJ
- C.25 KJ
- D.2 KJ
Answer: Option B
Explanation:
Given data: power of engine = 20 kW = 20,000 W
time = 10 s
we know Power = Work/Time (we know W = J/s)
20,000 = work/10
20,000 × 10 = work
So work = 200,000 J = 200 kJ.
(Reduce steps in exam):
W = P × T = 20,000 × 10 = 200 kJ.
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