JEE (Main) Physics - Units and Measurements Multiple Choice Questions (MCQs)

Which of the following is a fundamental quantity in the SI system?
- A. Velocity
- B. Force
- C. Time
- D. Pressure
Answer: C
What is the least count of a vernier caliper with 10 divisions on the vernier scale and 1 mm divisions on the main scale?
- A. 0.01 mm
- B. 0.1 mm
- C. 0.05 mm
- D. 0.02 mm
Answer: D
The dimensional formula of velocity is:
- A. [M⁰L¹T⁰]
- B. [M¹L¹T^-1]
- C. [M⁰L¹T^-1]
- D. [M⁰L⁰T^-1]
Answer: C
Which of the following has the same dimensional formula as energy?
- A. Work
- B. Momentum
- C. Force
- D. Pressure
Answer: A
The SI unit of electric current is:
- A. Coulomb
- B. Ampere
- C. Volt
- D. Ohm
Answer: B
If the error in measuring the radius of a sphere is 1%, the error in its volume is:
- A. 1%
- B. 2%
- C. 3%
- D. 4%
Answer: C
A physical quantity that has dimensions [M¹L¹T^-2] is:
- A. Acceleration
- B. Force
- C. Pressure
- D. Work
Answer: B
What is the dimensional formula of Planck's constant?
- A. [M¹L²T^-2]
- B. [M¹L²T^-1]
- C. [M¹L¹T^-1]
- D. [M²L²T^-1]
Answer: B
The dimensional formula of pressure is:
- A. [M¹L^-1T^-2]
- B. [M¹L¹T^-2]
- C. [M¹L^-2T^-2]
- D. [M¹L²T^-2]
Answer: C
The number of significant figures in 0.00230 is:
- A. 2
- B. 3
- C. 4
- D. 5
Answer: B
Which of the following quantities is dimensionless?
- A. Angular velocity
- B. Strain
- C. Momentum
- D. Energy
Answer: B
Dimensional analysis can be used to:
- A. Check the consistency of equations
- B. Derive new relations among physical quantities
- C. Convert units from one system to another
- D. All of the above
Answer: D
If the unit of force is changed, which of the following quantities remains unaffected?
- A. Work
- B. Energy
- C. Power
- D. Dimensionless constants
Answer: D
The SI unit of the moment of inertia is:
- A. kg m²
- B. kg m s^-1
- C. kg m² s^-2
- D. kg m^-1 s²
Answer: A
The product of mass and velocity gives:
- A. Energy
- B. Momentum
- C. Power
- D. Force
Answer: B

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JEE (Main) Physics - Units and Measurements Multiple Choice Questions (MCQs)

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