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
-
Speed
-
Density
-
Relative density
-
Volume
-
Area
C
Correct answer
Explanation
Relative density has no units.
-
per kelvin
-
ohm-meters
-
ohm
-
ampere
-
volt
A
Correct answer
Explanation
A ratio of increased conductor resistance per degree celsius rise in temperature. Most metals increase in resistance as temperature increases, giving them a positive temperature coefficient.
-
Kilometres
-
Nanometres
-
Light years
-
Light minutes
-
Miles
C
Correct answer
Explanation
The unit used for measuring distance between celestial bodies is light years. It is equivalent to distance travelled by light in a year.
-
Pascal
-
Kelvin
-
Centigrade
-
Candela
-
Ampere
B
Correct answer
Explanation
Kelvin is the SI unit of temperature.
-
volts
-
ampere
-
joules
-
watt
-
ohm
A
Correct answer
Explanation
This is the correct option. The electrical unit of measurement of voltage is volts and it is denoted by V.
-
Joule
-
Calorie
-
Kelvin
-
Celsius
-
None of these
A
Correct answer
Explanation
The SI unit of heat is the Joule (J), named after James Prescott Joule. Heat is a form of energy transfer, and since energy in the SI system is measured in Joules, heat is also measured in Joules. Calorie is a non-SI unit still commonly used in nutrition and some engineering applications.
-
Calorie
-
Joule
-
Kelvin
-
Fahrenheit
C
Correct answer
Explanation
Kelvin is the S.I unit of measuring temperature.
-
Joule
-
Calorie
-
Watt
-
Joule per kg <sup style="font-family:">0C
B
Correct answer
Explanation
Calorie is known as the common unit of heat. It is that amount of heat which can raise the temperature of 1 gram of water by 10C. One calorie = 4.2 Joules.
-
The SI unit of charge is coulomb
-
One coulomb is very large amount of charge
-
One micro coulomb is one millionth of a coulomb or 10-6C
-
All are true
D
Correct answer
Explanation
All the given statement about the unit of charge is true.
-
power
-
energy
-
e.m.f.
-
electric charge
D
Correct answer
Explanation
Ampere- Unit of current
Second= Unit of time
Current* time= Charge
-
Roentgen is not a SI unit.
-
Barn is not a SI unit.
-
Hour is not a SI unit.
-
Kilogram is a SI unit.
-
Degree is not a SI unit.
D
Correct answer
Explanation
Yes, kilogram is a SI unit, which is placed under non-SI unit group.
-
Length - Kilometre, Mass - Gram, Time - Second
-
Length - Milimetre, Mass - Milligram, Time - Second
-
Length - Centimetre, Mass - Gram, Time - Second
-
Length - Foot, Mass - Gram, Time - Minute
-
Length - Metre, Mass - Kilogram, Time - Minute
C
Correct answer
Explanation
Yes, it is correct.
Length - Centimetre, Mass - Gram and Time - Second
-
180 units,Rs 450
-
100 units,Rs 400
-
80 units,Rs 400
-
50 units,Rs 350
A
Correct answer
Explanation
Initial reading of electric meter = 4750 KWhFinal reading of electric meter = 4930 KWhTotal energy consumed during the month = 4930 - 4750 = 180 KWh = 180 unitsCost of 1 unit = Rs 2.50Total cost of 180 units = 180 * 2.50 = Rs 450
-
Viscocity
-
Surface tension
-
Chemical potential
-
Heat capacity
-
Electrical resistivity
B
Correct answer
Explanation
Surface tension is a contractive tendency of the surface of a liquid that allows it to resist an external force.
-
Atmosphere
-
Bar
-
Pascal
-
mm of Hg
C
Correct answer
Explanation
The SI unit of pressure is pascal.