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 Base, Derived, supplementary, Units ?

  • Ans 1: Base Units:The units of base quantities are known as base unit.
    Base quantity: Symbol
    Length l
    Mass M
    Time t
    Electric current I
    Temperature T
    Derived Quantity:The unit of derived quantities are known as derived units. The derived units can be derived from base unit and supplementary units
    Supplementary Units:The general conference on weight and measures has not yet classified certain units of the SI under either base units or derived units such SI Units are called supplementary units This class contains only two units of purely geometrical quantities which are place angle and the said angle.
    1. Radian :It is the unit of plane angle. One radian represents a plane angle subtended at the center of a circle by on are of length equal to radius of the circle.
    2. Steradian:Steradian is the unit for a solid angle in a three dimensional space steradian is defined as "the solid angle subtended at the center of a sphere by an area of its surface equal to the square of the radius of that sphere"
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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

Define Base, Derived, supplementary, Units ?

  • Ans 1: Base Units:The units of base quantities are known as base unit.
    Base quantity: Symbol
    Length l
    Mass M
    Time t
    Electric current I
    Temperature T
    Derived Quantity:The unit of derived quantities are known as derived units. The derived units can be derived from base unit and supplementary units
    Supplementary Units:The general conference on weight and measures has not yet classified certain units of the SI under either base units or derived units such SI Units are called supplementary units This class contains only two units of purely geometrical quantities which are place angle and the said angle.
    1. Radian :It is the unit of plane angle. One radian represents a plane angle subtended at the center of a circle by on are of length equal to radius of the circle.
    2. Steradian:Steradian is the unit for a solid angle in a three dimensional space steradian is defined as "the solid angle subtended at the center of a sphere by an area of its surface equal to the square of the radius of that sphere"
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 2

Question # 1

How many meters are there in one light year?

  • Ans 1: Since S= vt
    S =ct
    S = (3 x 108ms-1)(365x24x60x60 s)
    S= 9.46x 1015m
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 3

Question # 1

Define base units. Give one example.

  • Ans 1: Base Units: The units that describe base quantities are called base units.
  • Ans 2: Example: Kilogram (kg) base unit of mass (bass quantity
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 4

Question # 1

What is physical significance of dimension of physical quantity?

  • Ans 1: Each base quantity is considered a dimension. It stands for the qualitative nature of the physical quantity. Dimensions give information about the nature of a physical quantity, its units of measure and correctness of physical equation.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 5

Question # 1

What rules are of rounded off the significant figure?

  • Ans 1:
    1. If the first digit dropped is less than 5, the last digit retained should remain unchanged.
    2. If the first digit dropped is more than 5, the digit to be retained is increased by one.
    3. If the first digit to be dropped is 5 the previous digit which is to be retained is increased by one if it is odd and retained as such if it is even.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 6

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 7

Question # 1

What role SI units have played in the development of science

  • Ans 1: With the development of science and technology, S.I units fulfill the serious need of for a commonly accept system of unit all over the world.
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 8

Question # 1

How can you define term wave?

  • Ans 1: A wave is disturbance in the medium which causes the particles of medium to undergovibratory motion
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ICS Part 1 Physics Chapter 1 Short Questions Test - Set 9

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 10

Question # 1

How the distance between interference fringes will be affected if the distance between the slits in Young 's experiment is doubled.?

  • Ans 1: pic
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