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

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 1

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 2

Question # 1

Define acromegaly. Give its cause.

  • Ans 1: Abnormal increase in size of appendages and other body parts sue to excess release of thyroxin is called acromegaly.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 3

Question # 1

Explain the term " precision" and accuracy ?

  • Ans 1: The 'Precision represents the magnitude of error in a measurement while the accuracy means to check how the measured values are closer to the actual value. The accuracy represents the relative error. It can be obtained by dividing the error with measured quantity.
    The accuracy depends on the error if the error is greater than smaller will be the accuracy of the measurements and vice versa.
    The accuracy of the measurements can be increased by taking several readings and take their average.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 4

Question # 1

Differentiate between the precision and accuracy.

  • Ans 1: Precision: A measurement which has less absolute uncertainty is called precise measurement. The precision of a measurement is determined by the instrument being used.Absolute uncertainty , in effect, is equal to the least count of measuring instrument.
    Accuracy: is the one which has less fractional or percentage error. Accuracy measures,how close a measured value is to the actual value.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 5

Question # 1

Discuss the conventions for using SI units?

  • Ans 1: The various conventions for using SI are given below.
    1. Full name of the unit does not begin with a capital letter even if named after a scientist.
    2. symbol of unit name after scientist has initial capital latter for for example N for newton Pa for pascal H3 for hertz etc
    3. The prefixes is written before an adjacent to the unit
    4. The combination of units is written each with one space a part For example , Torque =55 N m
    5. Double, triple etc prefixes are not allowed
    6. When a multiple of base unit is raised to a power. The power applies to the whole multiple and not just the base unit
    7. Before substituting values in the formula to calculate the final result make sure that all the included physical quantities are expressed in their SI units.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 6

Question # 1

Define derived units and write two example.

  • Ans 1: Derived units: The units used to measure derived quantities are called derived units.
  • Ans 2: Examples: Unit of velocity is meter per second
    Unit of accelertationnn is meter per second per second ms
    Unit of Force is Newton (N)
    Unit of charge Coulomb (C)
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 7

Question # 1

Find the dimension of kinetic energy ?

  • Ans 1: pic
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 8

Question # 1

Explain " Rounding off numbers ?

  • Ans 1: The quantities in a measurement are always rounded off to certain level of accuracy. The following rules must be observed while rounding off a number.
    1. If the dropping digits is less than "5" then the last retained digit is kept as it is For example 863.73 is rounded to 863.7
    2. If the dropping digits is greater than '5' then the last retained digits is increased by '1' for example 9.66 is rounded to 9.7
    3. If the dropping digits is '5' and the last retained digit is even then it will be remain uneffected. For example 66.45 is rounded to 66.4
    4. If the dropping is '5' and the last retained digit is add, then it will be increases by '1' for example 76.35 is rounded to 76.4
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 9

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 10

Question # 1

Define Measurement, unit and Magnitude?

  • Ans 1: Measurement:The comparison of some thing with some standard is known as measurement.
    Unit:The standard with which thing are compared is known as unit.
    Magnitude:A number with proper unit is known as magnitude.
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