Q1. The SI unit of temperature is:
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Answer: D. Kelvin
The kelvin (K) is the SI base unit of temperature.
Physics - Units & Measurement Questions for SSC CGL (with Answers)
10 Physics - Units & Measurement MCQs from the General Awareness section, with answers and short explanations.
Score: 0 / 0
Q2. Which of the following is a vector quantity?
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Answer: A. Velocity
Velocity has both magnitude and direction, so it is a vector; speed, mass and time are scalars.
Q3. One light-year is a unit of:
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Answer: B. Distance
A light-year is the distance light travels in one year, so it measures distance.
Q4. Which instrument is used to measure atmospheric pressure?
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Answer: B. Barometer
A barometer measures atmospheric pressure.
Q5. Which of these is the SI unit of electric current?
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Answer: D. Ampere
Electric current is measured in amperes (A), an SI base unit.
Q6. Which unit is used to express the power of a lens?
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Answer: B. Dioptre
Power of a lens is measured in dioptres (D); 1 D = 1/m.
Q7. What is the SI unit of force?
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Answer: D. Newton
The SI unit of force is the newton (N), equal to 1 kg m/s².
Q8. A speed of 72 km/h is equal to:
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Answer: D. 20 m/s
72 × 5/18 = 20 m/s.
Q9. An astronomical unit (AU) is approximately the:
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Answer: A. Mean distance between the Earth and the Sun
1 AU is the average Earth–Sun distance, about 1.5 × 10^8 km.
Q10. 1 kilowatt-hour (kWh) is equal to:
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Answer: C. 3.6 × 10^6 joules
1 kWh = 1000 W × 3600 s = 3.6 × 10^6 J.
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