ICS Part 1 Physics English Medium Chapter 1 Online Short Questions Test with Answers

Online Short Questions For Chapter 1 "ICS Part 1 Physics Chapter 1 Short Questions Test "

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Physics - ICS Part 1 Physics Chapter 1 Short Questions Test

Question # 1

Why do we find it useful to have two units for the amount of substance kilogram and mole?

  • Ans 1: Both units are used to describe the amount of the substance. Kilogram is used for macroscopic objects or for macroscopic behavior of the objects while mole is used for microscopic object or on microscopic scale when number of atoms or molecules are concerned.
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Prepare Complete Set Wise Questions For Chapter 1 "ICS Part 1 Physics Chapter 1 Short Questions Test "

ICS Part 1 Physics Chapter 1 Short Questions Test - Set 1

Question # 1

Why do we find it useful to have two units for the amount of substance kilogram and mole?

  • Ans 1: Both units are used to describe the amount of the substance. Kilogram is used for macroscopic objects or for macroscopic behavior of the objects while mole is used for microscopic object or on microscopic scale when number of atoms or molecules are concerned.
Submit

ICS Part 1 Physics Chapter 1 Short Questions Test - Set 2

Question # 1

Why do we find it useful to have two units for the amount of substance kilogram and mole?

  • Ans 1: Both units are used to describe the amount of the substance. Kilogram is used for macroscopic objects or for macroscopic behavior of the objects while mole is used for microscopic object or on microscopic scale when number of atoms or molecules are concerned.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 3

Question # 1

What events occur in anaphase-I in meiosis?

  • Ans 1: During the anaphase of meiosis -1.The spindle fibers contract and each member of homologous chromosomes moves toward each pole.In this way half chromosomes reaches to one pole and other half reaches to another pole.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 4

Question # 1

Define physical quantities and derived quantities.

  • Ans 1: Physical quantites: All measurable quantities are called physical quantities.
  • Ans 2: Example: Length mass, time and temperature etc.
  • Ans 3: Derived quantites: The quantities that are expressed in terms of base quantities are called derived quantities.
  • Ans 4: Examples: Area, volume, speed, force, work etc are derived quantities.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 5

Question # 1

Does dimensional analysis give any information on constant of proportionality that may appear in algebraic expression? Explain.

  • Ans 1: Dimensional analysis does not give any information about constant of proportionality in any expression.This constant can be determined by experiments.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 6

Question # 1

What are two principal characteristics of an ideal standard?

  • Ans 1: An ideal standard has two principal characteristics.
    1. It is accessible.
    2. It is invariable.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 7

Question # 1

Define international system of units.

  • Ans 1: The international system of units is a scientific method of expressing the magnitudes of quantities of important natural phenomana. There are seven base units in the system, from which other units are derived. This system was formarly called the meter-kilogram second (MKS) system.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 8

Question # 1

What do you mean by significant figures ? Give the rules for determining significant figures ?

  • Ans 1: Significant Figures:The combination of accurately known digits and the first doubtful digits during a measurement are known as as significant figures
    Rules for determining significant figures:
    1. All non-zero digits from '1' to '9' are significant for example in 36.473 m there are five significant figure
    2. All zero between two non-zero digits are significant for example in y= 4.03 m there are three significant figures
    3. The zero to the right of a decimal symbol and to the left of non-zero digits are not significant
    4. All zero to the right of a decimal appears after non-zero digits are significant
    5. In case of scientific notation the figures before the power of ten are significant
    6. In case of addition and subtraction the result obtained is retained to the measurement which is least precise in the data
    7. In case of multiplication and division the final result is retained to the measurement which contains the last number of significant figure
    8. In case of rounding of non-significant figures the following rules should be followed.
    • IF the dropping digits is less than '5' then it will be just ignored For example 863.73 is rounded to 863.7
    • If the dropping digits is greater than '5' then the last retained digit is increased by '1' for example 8.76 is rounded of 8.8
    • If the dropping digits is '5' and the last retained digits is even then it will remains uneffected. for example, 56.45 is rounded to 56.4
    • If the dropping digits is '5' and the last retained and the last retained digits is add than it will be increased by '1' for example 46.35 is rounded to 46.4
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 9

Question # 1

Described the principle of homogeneity of dimensional analysis.

  • Ans 1: According to homogeneity principle
    "If the dimensions of physical quantities on both sides of equation are the same, then the equation will be dimensionally correct".
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 10

Question # 1

Write two uses of X-rays diffraction by crystals.

  • Ans 1: X-ray diffraction has been very useful in determining the structure of biologically important molecules such as hemoglobin and double helix structure of DNA.
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