Units and Measurements MCQS Class 11 Physics Topicwise

MCQs on Class 11 Chapter Units and Measurements

Class 11 Physics Chapter 1 Units and Measurements MCQs are provided here with answers. These questions are designed as per the latest CBSE syllabus and NCERT curriculum. Solving these chapter-wise MCQs will help students to score good marks in the final exam. Units and Measurements Class 11 Physics MCQs are prepared for a better understanding of the concept. It allows students to test their knowledge and answering skills in the given time frame.

Check the multiple-choice questions for the Class 11th Class Physics units and measurements chapter. Each MCQ will have four options here, out of which only one is correct. Students have to pick the correct option and check the answer provided here.

Set 1: SI Units (Fundamental Units)

1. Which of the following is a fundamental unit in the SI system?
   a) Newton
   b) Joule
   c) Meter
   d) Pascal
   Answer: c) Meter
   Explanation: The meter (m) is a fundamental unit of length in the SI system. Newton, Joule, and Pascal are derived units.
2. How many fundamental quantities are there in the SI system?
   a) 5
   b) 6
   c) 7
   d) 8
   Answer: c) 7
   Explanation: The seven fundamental quantities are length, mass, time, electric current, temperature, amount of substance, and luminous intensity.
3. Which of the following is NOT a fundamental quantity?
   a) Mass
   b) Time
   c) Speed
   d) Temperature
   Answer: c) Speed
   Explanation: Speed is a derived quantity because it is defined as distance (fundamental) per unit time (fundamental).
4. The SI unit of time is:
   a) Minute
   b) Hour
   c) Second
   d) Day
   Answer: c) Second
   Explanation: The second (s) is the SI base unit for time.
5. Which of these is a fundamental quantity?
   a) Work
   b) Force
   c) Energy
   d) Electric Current
   Answer: d) Electric Current
   Explanation: Electric current is a fundamental quantity, measured in amperes (A), while work, force, and energy are derived quantities.
6. The SI unit of mass is:
   a) Gram
   b) Kilogram
   c) Milligram
   d) Quintal
   Answer: b) Kilogram
   Explanation: The kilogram (kg) is the fundamental unit of mass in the SI system.
7. Which of the following is a derived unit?
   a) Kilogram
   b) Second
   c) Newton
   d) Mole
   Answer: c) Newton
   Explanation: Newton (N) is a derived unit for force (kg·m/s²).
8. The unit of force in the SI system is:
   a) Joule
   b) Pascal
   c) Newton
   d) Watt
   Answer: c) Newton
   Explanation: Force (F) is given by Newton’s second law: F = ma. Its unit is Newton (N) = kg·m/s².
9. The derived unit of power is:
   a) Joule
   b) Watt
   c) Newton
   d) Pascal
   Answer: b) Watt
   Explanation: Power is the rate of doing work. Its SI unit is Watt (W) = J/s = kg·m²/s³.
10. Which of the following is NOT a derived quantity?
    a) Velocity
    b) Acceleration
    c) Mass
    d) Work
    Answer: c) Mass
    Explanation: Mass is a fundamental quantity with SI unit kilogram (kg), while the rest are derived quantities.

Set 2: Derived Quantities and Units

11. The SI unit of pressure is:
    a) Joule
    b) Pascal
    c) Newton
    d) Watt
    Answer: b) Pascal
    Explanation: Pressure is force per unit area. Its SI unit is Pascal (Pa) = N/m² = kg·m⁻¹·s⁻².
12. The unit of work in the SI system is:
    a) Newton
    b) Joule
    c) Watt
    d) Pascal
    Answer: b) Joule
    Explanation: Work = Force × Displacement. The SI unit is Joule (J) = kg·m²/s².
13. What is the SI unit of frequency?
    a) Newton
    b) Hertz
    c) Pascal
    d) Joule
    Answer: b) Hertz
    Explanation: Frequency is measured in Hertz (Hz), which is equivalent to cycles per second (s⁻¹).
14. Which of the following is NOT a fundamental unit?
    a) Ampere
    b) Mole
    c) Volt
    d) Kelvin
    Answer: c) Volt
    Explanation: Volt is a derived unit for electric potential (V = W/A), while the others are fundamental units.
15. The unit of acceleration in SI is:
    a) m/s
    b) m/s²
    c) km/h²
    d) cm/s²
    Answer: b) m/s²
    Explanation: Acceleration is the rate of change of velocity, so its unit is m/s².

Set 3: Application-Based Questions

16. The SI unit of energy is:
    a) Watt
    b) Joule
    c) Newton
    d) Pascal
    Answer: b) Joule
    Explanation: Energy is measured in Joules (J), where 1 J = 1 N·m.
17. Which of the following is a fundamental unit?
    a) Kelvin
    b) Coulomb
    c) Volt
    d) Tesla
    Answer: a) Kelvin
    Explanation: Kelvin (K) is a fundamental unit of temperature, while Coulomb, Volt, and Tesla are derived units.
18. The unit of electric charge in SI is:
    a) Volt
    b) Ampere
    c) Coulomb
    d) Farad
    Answer: c) Coulomb
    Explanation: Charge (Q) is measured in Coulombs (C), where 1 C = 1 A·s.
19. The SI unit of resistance is:
    a) Ohm
    b) Farad
    c) Weber
    d) Henry
    Answer: a) Ohm
    Explanation: Electrical resistance is measured in Ohms (Ω), where Ω = V/A.
20. The SI unit of capacitance is:
    a) Henry
    b) Weber
    c) Farad
    d) Tesla
    Answer: c) Farad
    Explanation: Capacitance is measured in Farads (F), where 1 F = C/V.

Complete Chapter MCQs

1. The symbol to represent “Amount of Substance” is ________

1. K
2. A
3. Cd
4. mol

Answer: (d) mol

Explanation: The symbol to represent Amount of Substance is mol.

2. Which among the following is the Supplementary Unit——–

1. Mass
2. Time
3. Solid angle
4. Luminosity

Answer: (c) Solid angle

Explanation: Supplementary units are plane angles and solid angles. Other units mentioned are base units.

3. What is the unit of solid angle?

1. second
2. Steradian
3. kilogram
4. candela

Answer: (b) Steradian

Explanation: Steradian is the unit of solid angle.

4. AU is the unit of ________

1. Astronomy Unit
2. Astronomical unit
3. Astrological Unit
4. Archaeological Unit

Answer: (b) Astronomical unit

Explanation: Astronomical unit is the average distance of the Sun from the Earth. It is represented by the symbol AU.

5. Dimensions of kinetic energy is the same as that of ________

1. Acceleration
2. Velocity
3. Work
4. Force

Answer: (c) Work

Explanation: Dimensions of kinetic energy and work are the same.

6. Farad is the unit of ________

1. Luminosity
2. Wavelength
3. Permittivity
4. Inertia

Answer: (c) Permittivity

Explanation: Permittivity is the unit of Farad.

7. Electron volt is a unit of

1. Luminosity
2. Frequency
3. Force
4. Energy

Answer: (d) Energy

Explanation: One of the units of energy is electron volt.

8. Joule second is the unit of

1. Force
2. Angular momentum
3. Energy
4. Power

Answer: (b) Angular momentum

Explanation: Angular momentum is also known as rotational momentum. The total angular momentum of a closed system remains constant.

9. The smallest value which is measured using an instrument is known as ________

1. Absolute count
2. Least count
3. Round off value
4. Minimum count

Answer: (b) Least count

10. Which is the system of unit

1. SMS system
2. MKP system
3. FPS System
4. CJS System

Answer: (c) FPS System

Explanation: FPS System is one of the systems of units. Foot, Pound, and Second (FPS system).

Test Your Knowledge (Quiz)

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