Physics · Science General

Units and Measurement

1,044 Questions

Master the fundamentals of physics with these practice questions on units and measurement. The topics include fundamental SI units, derived quantities, and specific units for power, force, and light. These questions are essential for building a strong foundation for competitive exams.

SI fundamental unitsUnits of powerDerived quantities unitsThermal energy unitsVolume measurement unitsElectric current units

Units and Measurement Questions

Multiple choice

What is the SI unit of angular velocity?

  1. Meter per second

  2. Square meter per second

  3. Radians per second

  4. Meter per square second

  5. Radians per square second
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Angular velocity is considered to be a vector quantity, though it is often referred to as a pseudovector. The SI unit for angular velocity is the radian per second.

Multiple choice

Which of the following is the unit of pressure?

  1. Pascal

  2. Gauss

  3. Ampere

  4. Newton
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pascal is the SI unit of pressure, defined as one newton per square meter. Gauss measures magnetic field, Ampere measures electric current, and Newton measures force.

Multiple choice

Which one of the following units represents the largest amount of energy?

  1. Calorie

  2. Joule

  3. Erg

  4. Electron volt
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

1 Calorie = 4.184 Joules, which is much larger than 1 Joule, 1 Erg (10^-7 J), or 1 electron volt (1.6 × 10^-19 J). The Calorie is a unit of thermal energy commonly used in nutrition and represents the largest amount among these options.

Multiple choice

Which one of the following options represents a unit of work?

  1. Newton

  2. Kelvin

  3. Newton-metre

  4. Pascal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The product of force and displacement in the direction of force is known as the work done. So, work = force x distance  The unit of force is Newton and the unit of distance is metre.  Therefore, the unit of work is Newton-metre.