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JEE (Main) Physics - Units and Measurements Multiple Choice Questions (MCQs)
Units and Measurements - Multiple Choice Questions (MCQs)
1. Which of the following is not a fundamental quantity in the SI system?
A. Length
B. Mass
C. Temperature
D. Velocity
Answer: D. Velocity
B. Mass
C. Temperature
D. Velocity
Answer: D. Velocity
2. The SI unit of electric current is:
A. Volt
B. Ampere
C. Coulomb
D. Ohm
Answer: B. Ampere
B. Ampere
C. Coulomb
D. Ohm
Answer: B. Ampere
3. In the CGS system, the unit of force is:
A. Newton
B. Dyne
C. Erg
D. Joule
Answer: B. Dyne
B. Dyne
C. Erg
D. Joule
Answer: B. Dyne
4. What is the SI unit of luminous intensity?
A. Lux
B. Candela
C. Lumen
D. Watt
Answer: B. Candela
B. Candela
C. Lumen
D. Watt
Answer: B. Candela
5. Which of the following is not an SI base unit?
A. Kilogram
B. Second
C. Kelvin
D. Calorie
Answer: D. Calorie
B. Second
C. Kelvin
D. Calorie
Answer: D. Calorie
6. The dimensional formula of pressure is:
A. \([ML^{-1}T^{-2}]\)
B. \([MLT^{-2}]\)
C. \([ML^2T^{-3}]\)
D. \([ML^1T^{-1}]\)
Answer: A. \([ML^{-1}T^{-2}]\)
B. \([MLT^{-2}]\)
C. \([ML^2T^{-3}]\)
D. \([ML^1T^{-1}]\)
Answer: A. \([ML^{-1}T^{-2}]\)
7. One parsec is approximately equal to:
A. \(3.26\) light-years
B. \(1.5 \times 10^{11} \, \text{m}\)
C. \(3 \times 10^8 \, \text{m}\)
D. \(1 \, \text{AU}\)
Answer: A. \(3.26\) light-years
B. \(1.5 \times 10^{11} \, \text{m}\)
C. \(3 \times 10^8 \, \text{m}\)
D. \(1 \, \text{AU}\)
Answer: A. \(3.26\) light-years
8. The SI unit of power is:
A. Joule
B. Watt
C. Erg
D. Newton
Answer: B. Watt
B. Watt
C. Erg
D. Newton
Answer: B. Watt
9. The SI unit of energy is:
A. Erg
B. Joule
C. Calorie
D. Kilowatt-hour
Answer: B. Joule
B. Joule
C. Calorie
D. Kilowatt-hour
Answer: B. Joule
10. The relationship between joule and erg is:
A. \(1 \, \text{J} = 10^7 \, \text{erg}\)
B. \(1 \, \text{J} = 10^{-7} \, \text{erg}\)
C. \(1 \, \text{J} = 10^3 \, \text{erg}\)
D. \(1 \, \text{J} = 10^{-3} \, \text{erg}\)
Answer: A. \(1 \, \text{J} = 10^7 \, \text{erg}\)
B. \(1 \, \text{J} = 10^{-7} \, \text{erg}\)
C. \(1 \, \text{J} = 10^3 \, \text{erg}\)
D. \(1 \, \text{J} = 10^{-3} \, \text{erg}\)
Answer: A. \(1 \, \text{J} = 10^7 \, \text{erg}\)
11. Which of the following is not a derived unit in the SI system?
A. Joule
B. Hertz
C. Meter
D. Pascal
Answer: C. Meter
B. Hertz
C. Meter
D. Pascal
Answer: C. Meter
12. The unit of solid angle in the SI system is:
A. Radian
B. Steradian
C. Degree
D. Revolution
Answer: B. Steradian
B. Steradian
C. Degree
D. Revolution
Answer: B. Steradian
13. The SI unit of frequency is:
A. Decibel
B. Radian
C. Hertz
D. Revolution per minute
Answer: C. Hertz
B. Radian
C. Hertz
D. Revolution per minute
Answer: C. Hertz
14. What is the correct SI unit of density?
A. \(\text{kg}/\text{m}\)
B. \(\text{kg}/\text{m}^3\)
C. \(\text{g}/\text{cm}^3\)
D. \(\text{kg}/\text{l}\)
Answer: B. \(\text{kg}/\text{m}^3\)
B. \(\text{kg}/\text{m}^3\)
C. \(\text{g}/\text{cm}^3\)
D. \(\text{kg}/\text{l}\)
Answer: B. \(\text{kg}/\text{m}^3\)
15. The SI unit of the coefficient of viscosity is:
A. Poise
B. Pascal-second
C. Newton-second
D. Dyne-second
Answer: B. Pascal-second
B. Pascal-second
C. Newton-second
D. Dyne-second
Answer: B. Pascal-second
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