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 are the units for resistance?

  1. Ohms

  2. Lumens

  3. Volts

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

The Ohm is the standard SI unit of electrical resistance. Volts measure potential difference, and Joules measure energy.

Multiple choice dew point and humidity heat physics

The units of Relative Humidity are

  1. $kg-m^{3}$

  2. kg
  3. $kg-m^{2}$

  4. none of these
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Relative humidity refers to the ratio of the amount of moisture in the air at a certain temperature to the maximum amount of moisture that the air can retain at the same temperature. Relative humidity is expressed as a percentage and is highest during rain.

Multiple choice physics learning how to measure measuring length measurement of small and large distances measurement of distance unit of fundamental quantities

From the following, the biggest unit of energy is?

  1. Joule

  2. Kilowatt hour

  3. Erg

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

Since, we know that SI unit of energy is represented by Joule. Hence, let us convert all the different units in the form of Joules.


$1\,Joule=1\,Joule$

$1\,Kwh=3600000\,Joule$

$1\,erg=10^{-7}\,Joule$

$1\,eV=1.6\times 10^{-19}\,Joule$

Hence, Kilowatt hour is the largest unit of energy and hence it is practically used in everyday life of electric consumption.

Multiple choice maths perimeter and area of rectilinear figures region enclosed by a plane figure area of square and rectangle mensuration-i (area)

The standard unit of volume is in

  1. $m$
  2. $m^2$
  3. $m^3$

  4. None of the above
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

For eg., a cube is a $3D$ object.

$\therefore$ volume of a cuboid $=$ $l \times b \times h$
All the three dimensions are measures in "meter".
Hence, the unit of measure measurement of volume is in cubic meter or $m^3$.
So, option C is correct.