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 SI unit of electric current?

  1. Ampere

  2. Volt

  3. Ohm

  4. Coulomb

  5. Watt
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of electric current is ampere (A).

Multiple choice

The SI unit of electric current is:

  1. Ampere

  2. Volt

  3. Ohm

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

The SI unit of electric current is Ampere, which is defined as the flow of one coulomb of charge per second.

Multiple choice

The SI unit of density is:

  1. Kilograms per cubic meter (kg/m³)

  2. Newtons per square meter (N/m²)

  3. Pascals (Pa)

  4. Joules per cubic meter (J/m³)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Density is defined as mass per unit volume. In the International System of Units (SI), the unit of density is kilograms per cubic meter (kg/m³).

Multiple choice

The SI unit of surface tension is:

  1. Newtons per meter (N/m)

  2. Pascals (Pa)

  3. Joules per square meter (J/m²)

  4. Kilograms per cubic meter (kg/m³)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Surface tension is the force per unit length acting along the surface of a liquid. Its SI unit is Newtons per meter (N/m).

Multiple choice

The SI unit of dynamic viscosity is:

  1. Pascals (Pa)

  2. Newtons per square meter (N/m²)

  3. Pascals per second (Pa·s)

  4. Joules per cubic meter (J/m³)
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Dynamic viscosity is the measure of a fluid's resistance to flow under shear stress. Its SI unit is Pascals per second (Pa·s).

Multiple choice

What is the name of the fundamental unit of electric charge?

  1. Electron

  2. Proton

  3. Neutron

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

The fundamental unit of electric charge is the coulomb.

Multiple choice

What is the smallest meaningful unit of a word?

  1. Morpheme

  2. Phoneme

  3. Syllable

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

A morpheme is the smallest meaningful unit of a word that cannot be divided into smaller meaningful parts.

Multiple choice

What is the fundamental unit of matter according to modern chemistry?

  1. Atom

  2. Molecule

  3. Compound

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

In modern chemistry, the atom is recognized as the fundamental building block of matter. It consists of a nucleus, containing protons and neutrons, surrounded by electrons.

Multiple choice

What is the basic unit of matter?

  1. Atom

  2. Molecule

  3. Compound

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

An atom is the basic unit of matter and consists of a nucleus containing protons and neutrons, surrounded by electrons.

Multiple choice

What is the name of the unit used to measure the intensity of X-rays?

  1. Roentgen

  2. Gray

  3. Sievert

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

The unit used to measure the intensity of X-rays is the roentgen (R).

Multiple choice

What is the basic unit of time in GSM?

  1. Frame

  2. Slot

  3. Burst

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

The basic unit of time in GSM is the slot, which has a duration of 577 microseconds. Each slot is further divided into eight bursts, each carrying a specific type of information.

Multiple choice

What is the SI unit of mass?

  1. Kilogram

  2. Gram

  3. Pound

  4. Ounce

  5. Carat
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of mass is kilogram.

Multiple choice

What is the SI unit of length?

  1. Meter

  2. Centimeter

  3. Inch

  4. Foot

  5. Yard
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of length is meter.

Multiple choice

What is the SI unit of time?

  1. Second

  2. Minute

  3. Hour

  4. Day

  5. Year
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of time is second.

Multiple choice

What is the SI unit of electric charge?

  1. Coulomb

  2. Ampere

  3. Volt

  4. Ohm

  5. Farad
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The SI unit of electric charge is coulomb.