Physics ยท Science General

Units and Measurement

998 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

The basic unit of matter is the:

  1. Atom

  2. Molecule

  3. Compound

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

An atom is the smallest unit of matter that retains all the chemical properties of an element.

Multiple choice

The SI unit of force is the:

  1. Newton

  2. Joule

  3. Watt

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

The SI unit of force is the Newton (N), named after Sir Isaac Newton.

Multiple choice

The SI unit of energy is the:

  1. Joule

  2. Watt

  3. Newton

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

The SI unit of energy is the Joule (J), named after James Prescott Joule.

Multiple choice

The SI unit of temperature is the:

  1. Kelvin

  2. Celsius

  3. Fahrenheit

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

The SI unit of temperature is the Kelvin (K), named after Lord Kelvin.

Multiple choice

What is the unit of measurement for the amount of light emitted by a source?

  1. Watts

  2. Lumens

  3. Kelvin

  4. Candela
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Lumens measure the total amount of visible light emitted by a source and indicate the brightness perceived by the human eye.

Multiple choice

What is the unit of measurement for gravity?

  1. Meters per second squared (m/s^2)

  2. Newtons (N)

  3. Kilograms (kg)

  4. Joules (J)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gravity is measured in meters per second squared (m/s^2), representing the acceleration of an object due to gravity.

Multiple choice

What are the units of kinetic energy?

  1. Joules

  2. Watts

  3. Newtons

  4. Meters per second
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The units of kinetic energy are Joules. One Joule is equal to one kilogram meter squared per second squared.

Multiple choice

What is the SI unit of magnetic flux density?

  1. Tesla

  2. Weber

  3. Henry

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

The SI unit of magnetic flux density is Tesla (T), named after the Serbian-American inventor Nikola Tesla.