NEET Physics: System of Units Practice Questions
14 free multiple-choice questions on System of Units (Physics and Measurement) for NEET Physics, each with the correct answer and a step-by-step explanation. Attempt a question, then reveal the solution to check your reasoning.
Practice thousands more NEET questions in the app →Q1. In the SI system, the system of units is based on which set of fundamental quantities?
Show answer & explanation
Correct answer: A — Length, Mass, and Time
The SI system is built upon seven base quantities: length (meter), mass (kilogram), time (second), electric current (ampere), temperature (kelvin), amount of substance (mole), and luminous intensity (candela).
Q2. In the context of measurement, what role do SI units play?
Show answer & explanation
Correct answer: B — They provide a universal standard for measurement
SI units provide a universal and standardized system for measuring physical quantities across the globe.
Q3. The unit 'Newton' is an example of which type of unit?
Show answer & explanation
Correct answer: A — Derived unit
Newton (N) is a derived unit, as it is derived from fundamental units like mass and length (kg · m/s²).
Q4. Which prefix represents 10⁻⁹?
Show answer & explanation
Correct answer: B — Micro
The prefix micro (μ) represents 10⁻⁶, and nano (n) represents 10⁻⁹. (Correction: Nano is 10⁻⁹).
Q5. The SI unit of mass is the kilogram. Which is the SI unit for the base unit of time?
Show answer & explanation
Correct answer: B — Second
The SI unit for time is the second (s). The kilogram is the base unit for mass, not time.
Q6. The SI unit for electric current is the Ampere. What is the SI unit for electric charge?
Show answer & explanation
Correct answer: D — Coulomb
The SI unit for electric charge is the Coulomb (C).
Q7. Which of the following quantities is a derived unit in the SI system?
Show answer & explanation
Correct answer: C — Force
Force (Newton) is a derived unit, as it is calculated from fundamental units like mass (kg) and length (m). Meter and Second are base units.
Q8. Which of the following is a fundamental (base) SI unit for the physical quantity Mass?
Show answer & explanation
Correct answer: D — Kilogram
The base SI unit for mass is the kilogram (kg).
Q9. Which of the following is NOT a base SI unit?
Show answer & explanation
Correct answer: A — Ampere
Meter, Kilogram, Second, and Ampere are the base SI units.
Q10. The prefix 'nano' (n) in the SI system represents which factor?
Show answer & explanation
Correct answer: A — 10⁻⁹
The prefix 'nano' (n) represents a factor of 10⁻⁹. Thus, 1 nano = 10⁻⁹ of the base unit.
Q11. In the International System of Units (SI), which of the following is a base unit?
Show answer & explanation
Correct answer: D — Meter
The base units in the SI system are meter (length), kilogram (mass), second (time), ampere (electric current), kelvin (temperature), and mole (amount of substance). Meter is a fundamental base unit for length.
Q12. What is the SI unit for temperature?
Show answer & explanation
Correct answer: D — Kelvin
The SI unit for thermodynamic temperature is the Kelvin (K).
Q13. If 1 meter = 100 centimeters, what is the correct relationship between the SI unit 'meter' and the non-SI unit 'centimeter'?
Show answer & explanation
Correct answer: B — 1 m = 100 cm
The relationship is 1 meter = 100 centimeters. This demonstrates the standard metric scale.
Q14. The unit for luminous intensity is:
Show answer & explanation
Correct answer: A — Candela
The SI unit for luminous intensity is the candela (cd).
Keep going — practice on Padhai Karlo
Padhai Karlo gives you unlimited NEET practice: chapter-wise questions, timed quizzes, and full mock tests with an All-India Rank — free to start.
Get the free Android app →