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

Define the term error, uncertainty precision and accuracy in measurements?

  • Ans 1: Errors:The difference between measured value and actual value of a quantity is known as Error.
    Uncertainty:An estimate of the possible range of an error is known as uncertainty. (OR)
    The error which arises due to natural imperfections of the experimenter, the limitations of the apparatus and the changes in the environment during the measurement is known as uncertainty.
    Precision:The measure of the consistency of measurements is known as precision. It requirements the magnitude of error in measurements.
    Accuracy:The measure of correctness of a measurements is known as accuracy"
    The Accuracy means to check how the measure values is closer to the actual value It is a relative is closer to the actual value.It is a relative error. it can be obtained by dividing the error with measured quantity The accuracy depends on the error is greater than smaller will be the accuracy of the measurement can be increased by taking several reading and then take their average
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 1

Question # 1

Define the term error, uncertainty precision and accuracy in measurements?

  • Ans 1: Errors:The difference between measured value and actual value of a quantity is known as Error.
    Uncertainty:An estimate of the possible range of an error is known as uncertainty. (OR)
    The error which arises due to natural imperfections of the experimenter, the limitations of the apparatus and the changes in the environment during the measurement is known as uncertainty.
    Precision:The measure of the consistency of measurements is known as precision. It requirements the magnitude of error in measurements.
    Accuracy:The measure of correctness of a measurements is known as accuracy"
    The Accuracy means to check how the measure values is closer to the actual value It is a relative is closer to the actual value.It is a relative error. it can be obtained by dividing the error with measured quantity The accuracy depends on the error is greater than smaller will be the accuracy of the measurement can be increased by taking several reading and then take their average
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 2

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 3

Question # 1

What is physics ? Discuss the importance of physics ?

  • Ans 1: Physics:
    The branch of science which deals with the properties of matter energy and their mutual relationship is known as physics.
    Physics has played on importance role in our daily life.
    1. The electronic media like T.V, radio, Loudspeaker, Telephone, cell phone, Photo phone for machine etc are the important source of communication which works on the principles of physics.
    2. Information technology is based on the principle of physics which is the scientific method of storing, protecting, processing, Transmitting, receiving and retrieving information
    3. The whole world has become a global village due to use of computer net works which works on the principles of physics.
    4. Atomic bomb is the invention of physics which can be used for the production of huge amount of energy. It can be also used for defence purposes.
    5. X-rays, Y-rays Laser rays etc. are the inventions of physics which can be used in industry, health and agriculture department for various purposes.
    6. Cathode ray oscilloscope (C.R.O) is the invention of physics which can be used as graph plotting device to see the wave from of a repetitive electronic signals the C.R.O can be also used in T.V circuits in computers system and as A.C circuits or D.C circuits circuits.
    7. All means of transport, like aeroplane buses, motor cycles, railways etc work on the principles of physics
    8. Electricity is the invention of physics without which we can not imagine any machine in working conditions
    9. Rockets and satellites are the invention of physics with the help of which we can get information about the upper atmosphere.
    10. The simple machine like pulley, wedge, like leaver screw-jack etc are the invention of physics which can be used for various purposes invention of physics which can be used for various purpose in daily life.
    11. Physics explain the natural phenomena in term of fundamental principles and basics and basic Laws
    12. Electron microscope is the invention of physics which is used to see distant objects clearly.
    13. Microphone is the invention of physics which can be used to study microorganisms clearly and easily
    14. Telescope is the invention of physics which is used to see distance objects clearly.
    15. Physics employs the essential steps of scientific method observation recording analysis prediction and verification.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 4

Question # 1

What are derived units? Explain.

  • Ans 1: The units associated with the derived quantities are called derived units. SI units for measuring all other physical quantities are derived from the base and supplementary units. For example , newton, joule,watt and pascal are derived units.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 5

Question # 1

Express the following quantities using prefixes.

  • Ans 1: 5000 g
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 6

Question # 1

Define Physical Quantities ? Explain base quantities and derived quantities?

  • Ans 1: Physical Quantities:All the measurable quantities are known as physical quantities for example, speed, mass , force, velocity, momentum temperature etc
    • Base Quantities:These are those physical quantities in term of which other physical quantities can be defined the base quantities can not be defined in term of other physical quantities.
    Example of base quantities:These are the seven base quantities, which are given below.
    1. Mass
    2. Length
    3. Time
    4. Current
    5. Temperature
    6. Amount of substance
    7. Luminous intensity
    • Derived Quantities:Those physical quantities which can be derived from base quantities are known as derived quantities
    Example of derived quantities:
    Force, Work, Power, energy, momentum, torque, speed, acceleration etc are the example of derived physical quantities

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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 7

Question # 1

How can we reduce random and systematic error?

  • Ans 1: Reduce random error: Repeating the measurement several times and taking an average can reduce the effect of random error.

    Reduce systematic error: The systematic error can be reduced by comparing the instrument with another which is known to be more accurate and a correction factor is applied.
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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

Define basic units.

  • Ans 1: The units associated with the base quantities are called base units. Theses are meter, kilogram, second, ampere, kelvin, candela, mole.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 10

Question # 1

Define derived units.

  • Ans 1: The units associated with the derived quantities are called derived units. SI units for measuring all other physical quantities are derived from the base and supplementary units. For Example, newton, joule, watt, pascal etc.
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