Physics · 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

What is the unit of storativity?

  1. dimensionless

  2. m

  3. m^2

  4. m^3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The unit of storativity is dimensionless.

Multiple choice

What is the unit of specific yield?

  1. dimensionless

  2. m

  3. m^2

  4. m^3
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The unit of specific yield is dimensionless.

Multiple choice

What is the standard unit of atmospheric pressure?

  1. Pascals (Pa)

  2. Millibars (mb)

  3. Inches of mercury (inHg)

  4. Atmospheres (atm)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The standard unit of atmospheric pressure is pascals (Pa). However, other units such as millibars (mb), inches of mercury (inHg), and atmospheres (atm) are also commonly used.

Multiple choice

What is the unit of measurement for noise levels?

  1. Decibels (dB)

  2. Hertz (Hz)

  3. Pascals (Pa)

  4. Watts per square meter (W/m^2)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Noise levels are typically measured in decibels (dB), which is a logarithmic unit that represents the ratio of a sound pressure to a reference pressure.

Multiple choice

What is the SI unit of energy?

  1. Joule

  2. Watt

  3. Newton

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

The SI unit of energy is the joule (J), which is defined as the amount of work done when a force of one newton is applied over a distance of one meter.

Multiple choice

What is the SI unit of electric current?

  1. Ampere

  2. Volt

  3. Ohm

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

The SI unit of electric current is the ampere (A), which is defined as the flow of one coulomb of charge per second.

Multiple choice

What is the basic unit of charge in an electric circuit?

  1. Electron

  2. Proton

  3. Neutron

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

The basic unit of charge in an electric circuit is the electron, which carries a negative charge of 1.602 x 10^-19 coulombs.

Multiple choice

What is the SI unit of force?

  1. Newton

  2. Joule

  3. Watt

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

The SI unit of force is the newton (N), which is defined as the force required to accelerate a mass of one kilogram by one meter per second squared.

Multiple choice

What is the SI unit of energy?

  1. Joule

  2. Newton

  3. Watt

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

The SI unit of energy is the joule (J), which is defined as the energy transferred or work done when a force of one newton is applied over a distance of one meter in the direction of the force.

Multiple choice

Which of the following is a unit of angular momentum?

  1. Newton-meter

  2. Joule-second

  3. Kilogram-meter^2/second

  4. Radian-second
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The SI unit of angular momentum is the kilogram-meter^2/second (kg⋅m^2/s).

Multiple choice

What is the SI unit of mass?

  1. Kilogram

  2. Gram

  3. Pound

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

The SI unit of mass is the kilogram.

Multiple choice

What is the main unit of time used in astronomy?

  1. Second

  2. Minute

  3. Hour

  4. Year
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The year is the main unit of time used in astronomy. It is the time it takes for the Earth to orbit the Sun.

Multiple choice

What is the international system of units called?

  1. SI

  2. Metric System

  3. Imperial System

  4. US Customary System
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

SI stands for Systeme International d'Unites, and it is the international system of units.

Multiple choice

What is the base unit of length in the SI system?

  1. Meter

  2. Kilogram

  3. Second

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

The base unit of length in the SI system is the meter.

Multiple choice

What is the base unit of mass in the SI system?

  1. Meter

  2. Kilogram

  3. Second

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

The base unit of mass in the SI system is the kilogram.