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

Which of the following is a unit of electric charge?

  1. Ampere

  2. Coulomb

  3. Volt

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

The coulomb (C) is the SI unit of electric charge.

Multiple choice

What is the SI unit of electrical conductivity?

  1. Siemens per meter (S/m)

  2. Ohms per meter (Ω/m)

  3. Farads per meter (F/m)

  4. Henrys per meter (H/m)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Electrical conductivity is measured in Siemens per meter (S/m), which represents the ability of a material to conduct electric current.

Multiple choice

The SI unit of force is the:

  1. Newton (N)

  2. Kilogram (kg)

  3. Meter (m)

  4. Second (s)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The Newton is defined as the force required to accelerate a mass of one kilogram by one meter per second squared.

Multiple choice

The SI unit of mass is the:

  1. Kilogram (kg)

  2. Newton (N)

  3. Meter (m)

  4. Second (s)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The kilogram is defined as the mass of a specific platinum-iridium cylinder kept at the International Bureau of Weights and Measures in France.

Multiple choice

The SI unit of acceleration is the:

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

  2. Kilogram (kg)

  3. Newton (N)

  4. Second (s)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Acceleration is the rate of change of velocity, and is measured in meters per second squared.

Multiple choice

What is the SI unit of pressure?

  1. Pascal (Pa)

  2. Newton (N)

  3. Joule (J)

  4. Kilogram (kg)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Pressure is defined as force per unit area. In the International System of Units (SI), the unit of pressure is the Pascal (Pa), which is equal to one newton per square meter (1 Pa = 1 N/m^2).

Multiple choice

What is the SI unit of density?

  1. Kilogram per cubic meter (kg/m^3)

  2. Gram per cubic centimeter (g/cm^3)

  3. Pound per gallon (lb/gal)

  4. Pound per cubic foot (lb/ft^3)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of density is the kilogram per cubic meter (kg/m^3). Density is defined as mass per unit volume, and it is a measure of how much mass is contained in a given volume of a substance.

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, which is defined as 1/273.16 of the thermodynamic temperature of the triple point of water.

Multiple choice

What is the formula for calculating IoU?

  1. IoU = Intersection Area / Union Area

  2. IoU = Intersection Area - Union Area

  3. IoU = Intersection Area + Union Area

  4. IoU = Intersection Area * Union Area
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

IoU is calculated by dividing the area of the intersection of the predicted and ground truth bounding boxes by the area of the union of the two boxes.

Multiple choice

The SI unit of energy is:

  1. Joule

  2. Watt

  3. Newton

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

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

Multiple choice

What is the SI unit of temperature?

  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, which is defined as 1/273.16 of the thermodynamic temperature of the triple point of water.

Multiple choice

The SI unit of capacitance is:

  1. Farad

  2. Henry

  3. Ohm

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

The SI unit of capacitance is the farad (F), which represents the ability of a capacitor to store electrical charge.

Multiple choice

What is the name of the unit of capacity used by Charaka?

  1. Kuḍava

  2. Prastha

  3. Āḍhaka

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

The unit of capacity used by Charaka is called Kuḍava.

Multiple choice

Which of the following is the SI unit of length?

  1. Meter

  2. Centimeter

  3. Inch

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

The SI unit of length is the meter (m).

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 (kg).