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 full form of ALU?

  1. Arithmetic and light unit

  2. Arithmetic and logic unit

  3. Absolute logic unit

  4. Absolute light unit

  5. Absolute load unit
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

It is the correct full form of ALU.

Multiple choice

Unit of measuring electrical current is

  1. Ohm

  2. Volt

  3. Ampere

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

The ampere (A) is the SI unit of electric current, measuring the flow of electric charge. Ohm measures electrical resistance. Volt measures potential difference or voltage. Watt measures power (rate of energy transfer). Current is specifically measured in amperes.

Multiple choice

Which of the following statements is/are correct? a. The measurement is complete only if it shows the number and unit of measurement. b. The known fixed quantity is called measurement. c. The standard unit of measurement in use after revisions is the metric system.

  1. only a

  2. only b

  3. only c

  4. a and b

  5. b and c
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

This is the only correct statement. The measurement is considered complete only if it shows the number and unit of measurement.

Multiple choice

The S.I. unit of temperature is

  1. celsius

  2. fahrenheit

  3. centigrade

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

The Kelvin scale is the base unit of thermodynamic temperature in the International System of Units (SI).

Multiple choice

Which of the following statements is/are false?

a. For the sake of uniformity, scientists all over the world have accepted centimetric system of measurement. b. A unit that is acceptable to a majority of the people as a basic unit of measurement is called a standard unit. c. When the position of a body does not change with time, with respect to the surroundings, the body is said to be at rest.

  1. Only a

  2. Only a and b

  3. Only b

  4. Only b and c

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

This is the correct option as this statement is false. For the sake of uniformity, scientists all over the world have accepted metric system of measurement.

Multiple choice

Light year is a unit of

  1. distance

  2. light

  3. energy

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

A light year is a unit of astronomical distance representing the distance that light travels in a vacuum in one Julian year. It is approximately 9.46 trillion kilometers or 5.88 trillion miles.