Physical World & Units - Physical World
Q. What is the prefix for 10^6? (2022)
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A.
Kilo
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B.
Mega
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C.
Giga
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D.
Tera
Solution
The prefix for 10^6 is Mega (M).
Correct Answer: B — Mega
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Q. What is the standard unit of time in the SI system? (2020)
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A.
Minute
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B.
Hour
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C.
Second
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D.
Day
Solution
The standard unit of time in the SI system is the second (s).
Correct Answer: C — Second
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Q. Which of the following is a fundamental quantity? (2020)
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A.
Mass
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B.
Velocity
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C.
Force
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D.
Energy
Solution
Mass is a fundamental quantity in the SI system.
Correct Answer: A — Mass
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Q. Which of the following is the correct representation of 0.001 in scientific notation? (2023)
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A.
1 x 10^-3
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B.
1 x 10^3
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C.
1 x 10^1
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D.
1 x 10^-1
Solution
0.001 can be represented as 1 x 10^-3 in scientific notation.
Correct Answer: A — 1 x 10^-3
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