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Basic Physical Quantities and Measurements MCQs

Basic Physical Quantities and Measurements MCQs

Physics is defined as the branch of science concerned with the nature and properties of matter and energy. The study of physics includes mechanics, heat, sound, light and other radiation, electricity, magnetism, and the structure of atoms. In our daily life, Physics is involved in almost all aspects. Given below are top 10 MCQs on physical quantities and measurements.

Which of following is a base quantity

Which of following is a base quantity:

  1. Volume
  2. Speed
  3. Force
  4. Intensity of light

Correct answer: 4. Intensity of light

Explanation: There are seven base quantities. The list includes length, mass, time, electric current, temperature, intensity of light and the amount of a substance.

Which of following is a derived quantity

Which of following is a base quantity:

  1. Length
  2. Mass
  3. Force
  4. Intensity of light

Correct answer: 3. Force

Explanation: The physical quantities that are expressed in terms of base quantities are known as derived quantities. List of some derived quantities include area, volume, speed, force, work, energy, power, electric charge, electric potential. Frome given list length, mass and intensity are the base quantities and only force is derived quantity

1 pico equals

1 pico equals:

  1. 10-9
  2. 10-12
  3. 10-15
  4. 10-18

Correct answer: 3. 10-12

Explanation: 1 pico is a metric prefix. List of complete metric prefixes:

 Prefix     Symbol  Meaning
 dekada   101
 hectoh   102
 kilok   103
 megaM   106
 gigaG   109
 teraT   1012
 petaP   1015
 exaE   1018
 decid   10-1
 centic   10-2
 millim   10-3
 microµ   10-6
 nanon   10-9
 picop   10-12
 femtof   10-15
 attoa   10-18

Least count of Vernier Calliper is

Least count of Vernier Calliper is:

  1. 0.01 mm
  2. 0.1 mm
  3. 1 mm
  4. 2 mm

Correct answer: 2. 0.1 mm

Explanation:

Lease count of Vernier Calliper = Smallest reading on main scale/No of divisions on vernier scale

= 1 mm / 10 divisions

= 0.1 mm

= 0.01 cm

Least count of Screw Gauge is

Least count of Screw Gauge is:

  1. 0.001 mm
  2. 0.01 mm
  3. 0.1 mm
  4. 1 mm

Correct answer: 2. 0.01 mm

Explanation:

Lease count of Screw Gauge = Pitch of screw gauge/no of divisions on circular scale

= 1 mm / 100 divisions

= 0.01 mm

= 0.001 cm

Number of significant figures in 100.7 are

Number of significant figures in 100.7 are:

  1. One
  2. Two
  3. Three
  4. Four

Correct answer: Four

1 femto equals

1 femto equals:

  1. 10-9
  2. 10-12
  3. 10-15
  4. 10-18

Correct answer: 3. 10-15

SI unit of speed is

SI unit of speed is:

  1. meter per second
  2. cubic metre
  3. meter per second squared
  4. pascal

Correct answer: 1. meter per second

SI unit of intensity of light is

SI unit of intensity of light is:

  1. mole
  2. kelvin
  3. candela
  4. kilogramme

Correct answer: 3. Candela

0.00043 =

0.00043 =

  1. 4.3 x 10-3
  2. 4.3 x 10-4
  3. 4.3 x 10-5
  4. 4.3 x 10-6

Correct answer: 2. 4.3 x 10-4

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