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Doctors Medicines MCQs Q&A

  1. Only I
  2. Only II
  3. Only III
  4. Both II and III
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1 Answers

Option 3 : Only III

Concept:

Unit:

  • The standard measurement of a quantity is called a unit.
  • For example- mass is measured in kilograms.
  • There are three types of unit systems:
SI /MKS unit system: CGS unit system: FPS unit system;
  • In this system, the length is measured in meters (m), mass is measured in kilogram (kg) and time is measured in seconds (s).
  • In this system, length is measured in centimeters (cm), mass is measured in grams (g) and time is taken in seconds (s).
  • In this system, length is measured in the foot, mass is measured in the pound, and time is measured in second (s).
  • For example the SI unit of velocity is m/s
  • For example, the CGS unit of density is g/cm3.
  • For example the FPS unit of volume is foot3

EXPLANATION:

  • The International System of Units (S.I. Unit) of time is the second (s).
  • The second is the duration of 9 192 631 770 periods of the radiation corresponding to the transition between the two hyperfine levels of the ground state of the cesium 133 atoms.

 

  • Fundamental Quantity: An independent Physical Quantity that cannot be expressed in terms of other Physical Quantities is called fundamental quantity.
    • They are conventionally chosen. It is used as a base to get other derived quantities by combining them.
  • Fundamental unit: The SI unit of a fundamental quantity is called a fundamental unit.
    • There are 7 fundamental quantities and their fundamental units.
    • The fundamental Quantities are Length, Mass, Time, Electric Current, Thermodynamic Temperature, Luminous intensity, etc.
  • ​Supplementary units:  The units that are used along with base units to form derived units in the International System are called supplementary units.

 

Fundamental Quantities
Quantities S.I unit
Mass  Kilogram(kg)
Length meter(m)
Time second(s)
Amount of Substance Mole(mol)
Temperature Kelvin(K)
Electric Current Ampere(A)
Luminous intensity Candela(cd)
Supplementary Quantities
Plane angle  radian(rad)
Solid angle steradian(Sr)
Derived Quantities
Force Newton(N)
Work Joule(J), calorie
Pressure Pascal(Pa)
Power Watt(W)
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Related Questions

Given below are two quantities named A and B. Based on the given information, you have to determine the relation between the two quantities. You should use the given data and knowledge of Mathematics to choose between the possible answers. There are two jars which contain different liquids in different quantities Quantity I∶ Quantity of water in Jar 1, if Jar 1 contains mixture of 230 litres which contain juice, water, coke and pepsi. Ratio of quantity of water to juice is 2 : 1 and juice to coke is also 2 ∶ 1 while the ratio of quantity of coke to pepsi is 3 ∶ 2 Quantity II∶ Quantity of water in Jar 2, if Jar 2 contains 10 litres of mixture more than jar 1 and contains juice, coke and water. Water, juice and coke is poured into the jar 8 times in the ratio 3 ∶ 2 ∶ 1. Every time the quantity of a liquid is same.?
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