Q. What is the purpose of using a vernier caliper? (2019)
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A.
To measure mass
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B.
To measure temperature
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C.
To measure length with high precision
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D.
To measure volume
Solution
A vernier caliper is used to measure lengths with high precision.
Correct Answer: C — To measure length with high precision
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Q. What is the significance of significant figures in a measurement? (2019)
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A.
They indicate the precision of the measurement
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B.
They indicate the accuracy of the measurement
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C.
They are used for unit conversion
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D.
They are irrelevant
Solution
Significant figures indicate the precision of a measurement, reflecting the certainty of the digits.
Correct Answer: A — They indicate the precision of the measurement
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Q. What is the significance of significant figures in measurements? (2019)
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A.
To indicate the precision of a measurement
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B.
To show the accuracy of a measurement
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C.
To represent the unit of measurement
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D.
To determine the error in measurement
Solution
Significant figures indicate the precision of a measurement, reflecting the certainty of the digits.
Correct Answer: A — To indicate the precision of a measurement
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Q. What is the unit of measurement for electric current in the SI system? (2022)
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A.
Volt
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B.
Ampere
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C.
Ohm
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D.
Coulomb
Solution
The SI unit of electric current is the Ampere (A).
Correct Answer: B — Ampere
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Q. What is the unit of measurement for electric current? (2019)
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A.
Volt
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B.
Ohm
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C.
Ampere
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D.
Watt
Solution
The SI unit of electric current is the Ampere (A).
Correct Answer: C — Ampere
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Q. What is the value of the gravitational constant (G) in SI units? (2023)
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A.
6.67 x 10^-11 N m²/kg²
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B.
9.81 m/s²
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C.
3.00 x 10^8 m/s
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D.
1.60 x 10^-19 C
Solution
The gravitational constant (G) is 6.67 x 10^-11 N m²/kg².
Correct Answer: A — 6.67 x 10^-11 N m²/kg²
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Q. Which instrument is used to measure atmospheric pressure? (2020)
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A.
Barometer
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B.
Thermometer
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C.
Anemometer
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D.
Hygrometer
Solution
A barometer is used to measure atmospheric pressure.
Correct Answer: A — Barometer
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Q. Which of the following describes a random error? (2020)
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A.
Consistent error in measurements
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B.
Error due to environmental factors
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C.
Error due to instrument calibration
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D.
Error that can be corrected
Solution
Random errors are caused by unpredictable fluctuations in the measurement process, often due to environmental factors.
Correct Answer: B — Error due to environmental factors
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Q. Which of the following is a common source of random error in measurements? (2022)
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A.
Calibration errors
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B.
Environmental changes
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C.
Instrument defects
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D.
Systematic bias
Solution
Environmental changes can cause variations in measurements, leading to random errors.
Correct Answer: B — Environmental changes
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Q. Which of the following is a common source of random error? (2023)
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A.
Instrument calibration
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B.
Environmental conditions
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C.
Human reaction time
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D.
Systematic bias
Solution
Human reaction time can introduce variability in measurements, leading to random errors.
Correct Answer: C — Human reaction time
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Q. Which of the following is a systematic error? (2020)
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A.
Parallax error
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B.
Zero error
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C.
Random error
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D.
Instrumental error
Solution
Systematic errors are consistent and repeatable errors associated with faulty equipment or a flawed experiment design, such as zero error.
Correct Answer: B — Zero error
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Q. Which of the following is an example of a scalar quantity? (2023)
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A.
Velocity
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B.
Force
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C.
Mass
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D.
Acceleration
Solution
Mass is a scalar quantity as it has magnitude but no direction.
Correct Answer: C — Mass
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Q. Which of the following is NOT a derived unit? (2023)
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A.
Newton
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B.
Joule
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C.
Kilogram
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D.
Pascal
Solution
Kilogram is a fundamental unit, while Newton, Joule, and Pascal are derived units.
Correct Answer: C — Kilogram
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Q. Which of the following represents a systematic error? (2020)
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A.
Calibration error
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B.
Random fluctuations
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C.
Environmental changes
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D.
Human error
Solution
Systematic errors are consistent and repeatable inaccuracies, often due to calibration errors.
Correct Answer: A — Calibration error
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Q. Which of the following represents the concept of significant figures? (2023)
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A.
All digits in a number
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B.
Only the non-zero digits
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C.
All digits except leading zeros
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D.
All digits except trailing zeros
Solution
Significant figures include all non-zero digits and any zeros between them or trailing after a decimal point.
Correct Answer: C — All digits except leading zeros
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Showing 31 to 45 of 45 (2 Pages)
