Unit And Measurement — Part 2 MCQs with Explanations
Practice high-yield Physics & Applied Physics MCQs on Unit And Measurement — Part 2 with worked academic solutions for MDCAT, CSS, PMS, PPSC, FPSC.
Questions
40
Difficulty Level
Exam-Level
Target Exams
MDCAT, CSS, PMS...
Estimated Time
48 mins
Exam-Level MDCAT CSS PMS PPSC FPSC
Verified for Commission Syllabus • Oct 14, 2026
40
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Question 1 of 40
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How can the height of a person who is six feet tall, be expressed (approximately) in nanometre?
Correct Answer: Option C — 183 × 107 nm
Detailed Academic Explanation:
183 × 107 nm is the correct answer to “How can the height of a person who is six feet tall, be expressed (approximately) in nanometre”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 2 of 40
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The physical unit is
Correct Answer: Option A — the standard amount of a physical quantity chosen to measure the physical quantity of the same kind
Detailed Academic Explanation:
the standard amount of a physical quantity chosen to measure the physical quantity of the same kind is the correct answer to “The physical unit is”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 3 of 40
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Which among the following devices is used to measure the atmospheric pressure?
Correct Answer: Option D — Barometer
Detailed Academic Explanation:
Barometer is the correct answer to “Which among the following devices is used to measure the atmospheric pressure”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 4 of 40
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Which one of the following can be used to measure temperature above 1500°C?
Correct Answer: Option D — Pyrometer
Detailed Academic Explanation:
Pyrometer is the correct answer to “Which one of the following can be used to measure temperature above 1500°C”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 5 of 40
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Which of the following has both direction and magnitude?
Correct Answer: Option C — Momentum
Detailed Academic Explanation:
Momentum is the correct answer to “Which of the following has both direction and magnitude”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 6 of 40
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The SI unit of sound wave frequency was named in honour of which physicist?
Correct Answer: Option B — Heinrich Rudolf Hertz
Detailed Academic Explanation:
Heinrich Rudolf Hertz is the correct answer to “The SI unit of sound wave frequency was named in honour of which physicist”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 7 of 40
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Which of the following units is used to measure the intensity of sound?
Correct Answer: Option C — Decibel
Detailed Academic Explanation:
Decibel is the correct answer to “Which of the following units is used to measure the intensity of sound”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 8 of 40
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Micron is equal to
Correct Answer: Option C — 0.001 mm
Detailed Academic Explanation:
0.001 mm is the correct answer to “Micron is equal to”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 9 of 40
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The unit of pressure is
Correct Answer: Option D — None of the above/More than one of the above
Detailed Academic Explanation:
None of the above/More than one of the above is the correct answer to “The unit of pressure is”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 10 of 40
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1 atmosphere = ?
Correct Answer: Option A — 1.01 × 105Pa
Detailed Academic Explanation:
1.01 × 105Pa is the correct answer to “1 atmosphere =”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 11 of 40
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What is false about richter scale?
Correct Answer: Option D — A magnitude of 8 - 9 on the Richter scale means a light earthquake
Detailed Academic Explanation:
A magnitude of 8 - 9 on the Richter scale means a light earthquake is the correct answer to “What is false about richter scale”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 12 of 40
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Which instrument is used for measuring voltage?
Correct Answer: Option D — Voltmeter
Detailed Academic Explanation:
Voltmeter is the correct answer to “Which instrument is used for measuring voltage”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 13 of 40
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Which of the following has magnitude and no direction?
Correct Answer: Option A — Work
Detailed Academic Explanation:
Work is the correct answer to “Which of the following has magnitude and no direction”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 14 of 40
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Match the columns Column I (Quantity) Column II (Unit) a. Luminous intensity 1. Kelvin b. Amount of substance 2. Candela c. Time 3. Second d. Temperature 4. Mole
Correct Answer: Option A — a-2, b-4, c-3, d-1
Detailed Academic Explanation:
a-2, b-4, c-3, d-1 is the correct answer to “Match the columns Column I (Quantity) Column II (Unit) a. Luminous intensity 1. Kelvin b. Amount of substance 2. Candela c. Time 3. Second d. Temperature 4. Mole”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 15 of 40
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The SI unit of acceleration is
Correct Answer: Option B — ms-2
Detailed Academic Explanation:
ms-2 is the correct answer to “The SI unit of acceleration is”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 16 of 40
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How many microns are there in a metre?
Correct Answer: Option C — 1000000
Detailed Academic Explanation:
1000000 is the correct answer to “How many microns are there in a metre”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 17 of 40
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Match List-I with List-II and select the correct answer: List-I (Units) List-II (Parametric quantities) a. Watt 1. Heat b. Knot 2. Navigation c. Nautical mile 3. Speed of a ship d. Calorie 4. Power
Correct Answer: Option C — a-4, b-3, c-2, d-1
Detailed Academic Explanation:
a-4, b-3, c-2, d-1 is the correct answer to “Match List-I with List-II and select the correct answer: List-I (Units) List-II (Parametric quantities) a. Watt 1. Heat b. Knot 2. Navigation c. Nautical mile 3. Speed of a ship d. Calorie 4. Power”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 18 of 40
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A 'light year' is a unit that is use to measure:
Correct Answer: Option B — Distance
Detailed Academic Explanation:
Distance is the correct answer to “A 'light year' is a unit that is use to measure:”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 19 of 40
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'Dobson' unit is used for the measurement of
Correct Answer: Option C — Thickness of Ozone layer
Detailed Academic Explanation:
Thickness of Ozone layer is the correct answer to “'Dobson' unit is used for the measurement of”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 20 of 40
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Which of the following devices is used to measure relatively high temperature, such as are encountered in furnaces?
Correct Answer: Option B — Pyrometer
Detailed Academic Explanation:
Pyrometer is the correct answer to “Which of the following devices is used to measure relatively high temperature, such as are encountered in furnaces”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 21 of 40
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The rate of doing work is called power. The unit of power is
Correct Answer: Option D — Watt
Detailed Academic Explanation:
Watt is the correct answer to “The rate of doing work is called power. The unit of power is”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 22 of 40
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Unit of power in industry is-
Correct Answer: Option D — Horsepower
Detailed Academic Explanation:
Horsepower is the correct answer to “Unit of power in industry is-”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 23 of 40
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Match the following- 1. Magnetic flux density a. Tesla 2. Self inductance b. Weber 3. Magnetic flux c. Henry
Correct Answer: Option D — 1-a, 2-c, 3-b
Detailed Academic Explanation:
1-a, 2-c, 3-b is the correct answer to “Match the following- 1. Magnetic flux density a. Tesla 2. Self inductance b. Weber 3. Magnetic flux c. Henry”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 24 of 40
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Which instrument is used to measure atmospheric pressure?
Correct Answer: Option B — Barometer
Detailed Academic Explanation:
Barometer is the correct answer to “Which instrument is used to measure atmospheric pressure”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 25 of 40
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The commercial unit of electric energy is . . . . . . . .
Correct Answer: Option C — kilowatt-hour
Detailed Academic Explanation:
kilowatt-hour is the correct answer to “The commercial unit of electric energy is . . . . . . . .”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 26 of 40
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What is the unit of atmospheric pressure?
Correct Answer: Option A — Bar
Detailed Academic Explanation:
Bar is the correct answer to “What is the unit of atmospheric pressure”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 27 of 40
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What is an example of vector quantity?
Correct Answer: Option C — Velocity
Detailed Academic Explanation:
Velocity is the correct answer to “What is an example of vector quantity”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 28 of 40
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The unit for measurement of energy is
Correct Answer: Option B — Joule
Detailed Academic Explanation:
Joule is the correct answer to “The unit for measurement of energy is”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 29 of 40
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What is the SI unit of pressure?
Correct Answer: Option A — Pascal
Detailed Academic Explanation:
Pascal is the correct answer to “What is the SI unit of pressure”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 30 of 40
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Match the following. Quanity SI Unit a. Frequency 1. Ohm b. Force 2. Hertz c. Resistance 3. Newton
Correct Answer: Option A — a-2, b-3, c-1
Detailed Academic Explanation:
a-2, b-3, c-1 is the correct answer to “Match the following. Quanity SI Unit a. Frequency 1. Ohm b. Force 2. Hertz c. Resistance 3. Newton”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 31 of 40
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Which unit of measurement is multiplied by 0.39 to convert it to 'inches'?
Correct Answer: Option B — Centimetre
Detailed Academic Explanation:
Centimetre is the correct answer to “Which unit of measurement is multiplied by 0.39 to convert it to 'inches'”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 32 of 40
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Those quantities which can be derived from the fundamental quantities are called
Correct Answer: Option B — Derived Quantities
Detailed Academic Explanation:
Derived Quantities is the correct answer to “Those quantities which can be derived from the fundamental quantities are called”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 33 of 40
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What is the SI unit of retardation?
Correct Answer: Option D — ms-2
Detailed Academic Explanation:
ms-2 is the correct answer to “What is the SI unit of retardation”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 34 of 40
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Which one of the following devices is used to measure extremely high temperature?
Correct Answer: Option A — Pyrometer
Detailed Academic Explanation:
Pyrometer is the correct answer to “Which one of the following devices is used to measure extremely high temperature”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 35 of 40
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Match List-I with List-II and select the correct answer: List-I List-II a. Anemometer 1. Earthquakes b. Seismograph 2. Atmospheric Pressure c. Barograph 3. Wind velocity d. Hygrometer 4. Humidity
Correct Answer: Option D — a-3, b-1, c-2, d-4
Detailed Academic Explanation:
a-3, b-1, c-2, d-4 is the correct answer to “Match List-I with List-II and select the correct answer: List-I List-II a. Anemometer 1. Earthquakes b. Seismograph 2. Atmospheric Pressure c. Barograph 3. Wind velocity d. Hygrometer 4. Humidity”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 36 of 40
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Which one of the following is the unit of Force?
Correct Answer: Option D — Newton
Detailed Academic Explanation:
Newton is the correct answer to “Which one of the following is the unit of Force”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 37 of 40
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Match the columns. Column I (Quantity) Column II (Dimension) a. Velocity 1. [MLT -2] b. Force 2. [LT -1 ] c. Work 3. [ML 2 T -2 ] d. Momentum 4. [MLT -1 ]
Correct Answer: Option A — a-2, b-1, c-3, d-4
Detailed Academic Explanation:
a-2, b-1, c-3, d-4 is the correct answer to “Match the columns. Column I (Quantity) Column II (Dimension) a. Velocity 1. [MLT -2] b. Force 2. [LT -1 ] c. Work 3. [ML 2 T -2 ] d. Momentum 4. [MLT -1 ]”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 38 of 40
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Which of the following is a seismometer device?
Correct Answer: Option B — Seismograph
Detailed Academic Explanation:
Seismograph is the correct answer to “Which of the following is a seismometer device”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 39 of 40
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Match List-I with List-II and select the correct answer: List-I List-II a. Cusec 1. Pressure b. Byte 2. Intensity of Earthquake c. Richter 3. Rate of flow d. Bar 4. Computer
Correct Answer: Option B — a-3, b-4, c-2, d-1
Detailed Academic Explanation:
a-3, b-4, c-2, d-1 is the correct answer to “Match List-I with List-II and select the correct answer: List-I List-II a. Cusec 1. Pressure b. Byte 2. Intensity of Earthquake c. Richter 3. Rate of flow d. Bar 4. Computer”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
Question 40 of 40
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Vector quantities have
Correct Answer: Option C — magnitude and direction
Detailed Academic Explanation:
magnitude and direction is the correct answer to “Vector quantities have”. This question is standard in competitive examination syllabi for Unit And Measurement.
💡Key Conceptual Anchor:Unit And Measurement
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💡Examiner's Advisory for Physics & Applied Physics
In competitive commission exams (FPSC, PPSC, KPPSC, SPSC, CSS, PMS), questions are frequently phrased with distractor options designed to catch rote learners. Whenever you answer an MCQ, read the Detailed Academic Explanation and Conceptual Anchor to understand why the remaining options are incorrect.