Physics · Science General

Units and Measurement

1,044 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

An electric meter reads 4930 KWh at the end of the month,while a month ago it read 4750 KWh.How many units of electrical energy have been consumed during the month and what will be the cost of electrical energy if 1 unit of energy costs Rs.2.50?

  1. 180 units,Rs 450

  2. 100 units,Rs 400

  3. 80 units,Rs 400

  4. 50 units,Rs 350
Reveal answer Fill a bubble to check yourself
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

Multiple choice

Which of the following pairs is not correctly matched?

  1. SI unit of temperature : Kelvin

  2. SI unit of mass : Kilogram

  3. SI unit of pressure : Pascal per square metre

  4. SI unit of weight : Newton

  5. SI unit of length : Metre
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

SI unit of pressure is Pascal or Nm-2.

Multiple choice

Which of the following is an example of fundamental unit?

  1. Density

  2. Acceleration

  3. Force

  4. Length

  5. Speed
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The units which are independent or cannot be derived from any other unit is called fundamental unit. Every unit of length is fundamental unit (irrespective of the system to which it belongs); millimeter, centimeter, meter, kilometer.