Physical Quantities and Measurement Quiz
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Questions and Answers

A ______ is defined as any quantity that can be measured.

  • None of these
  • Unit
  • Derived unit
  • Physical quantity (correct)

    • Number and unit.

  • Scalar (correct)
  • Derived
  • Vector
  • None of these

    • Vector physical quantities are defined by a ______ and direction.

  • Speed
  • None of these
  • Length
  • Magnitude (correct)

    • Out of the following ______ is not a scalar quantity.

    <p>Displacement</p> Signup and view all the answers

    Displacement is a ______ quantity.

    <p>Vector</p> Signup and view all the answers

    In 10 m rod length, 10 represents ______ and ______ represents ______.

    <p>Magnitude, unit</p> Signup and view all the answers

    Mass, length, time etc. are examples of ______.

    <p>Physical quantity</p> Signup and view all the answers

    ______ is defined as the reference standard used for the measurement of a physical quantity.

    <p>Unit</p> Signup and view all the answers

    There are ______ fundamental quantities.

    <p>7</p> Signup and view all the answers

    ______ is a supplementary quantity.

    <p>Solid angle</p> Signup and view all the answers

    The value of x in 1 kg/m³ = 10* gm/cm³ is ______.

    <p>-3</p> Signup and view all the answers

    The fundamental unit out of the following is ______.

    <p>Ampere</p> Signup and view all the answers

    The unit of volume are ______.

    <p>m³</p> Signup and view all the answers

    The volume of a cube is ______ if its side is 4 m.

    <p>64 m³</p> Signup and view all the answers

    The unit of luminous intensity is ______.

    <p>Candela</p> Signup and view all the answers

    The unit to measure ______ is light year.

    <p>Distance</p> Signup and view all the answers

    The unit of heat energy in MKS system is ______.

    <p>joule</p> Signup and view all the answers

    Newton = 10^6 dynes.

    <p>10^4</p> Signup and view all the answers

    The unit of ______ is kW-h.

    <p>Energy</p> Signup and view all the answers

    Watt is the unit of ______.

    <p>Power</p> Signup and view all the answers

    Micro, milli, etc are called as ______

    <p>Prefixes</p> Signup and view all the answers

    1 GW = ______ kW.

    <p>10^6</p> Signup and view all the answers

    If the length of a rod is 5 m, here 5 is ______.

    <p>Magnitude</p> Signup and view all the answers

    The common unit of a physical quantity in M.K.S and S.I systems is ______.

    <p>Joule/sec</p> Signup and view all the answers

    ______ is the common fundamental C.G.S., F.P.S and M.K.S systems.

    <p>Sec</p> Signup and view all the answers

    Unit and derived units are the two types of units.

    <p>None of these</p> Signup and view all the answers

    ______ is a derived quantity.

    <p>Speed</p> Signup and view all the answers

    ______ system of units is known as the British system.

    <p>FPS</p> Signup and view all the answers

    The unit of mass is ______ in FPS system.

    <p>Pound</p> Signup and view all the answers

    The unit of length is ______ in FPS system.

    <p>foot</p> Signup and view all the answers

    The unit of force is ______ in CGS system.

    <p>dyne</p> Signup and view all the answers

    Corresponding SI unit of kg/m³ is ______.

    <p>kg/m³</p> Signup and view all the answers

    Mass is one of the ______ physical quantities.

    <p>Fundamental</p> Signup and view all the answers

    Angular velocity has the units ______.

    <p>rad/s</p> Signup and view all the answers

    The S.I unit of K.E is ______ times that of C.G.S unit of K.E.

    <p>10^7</p> Signup and view all the answers

    The unit of energy in SI system is ______.

    <p>None of the above</p> Signup and view all the answers

    Out of the following ______ is not the unit of power.

    <p>N/sec</p> Signup and view all the answers

    The physical quantity ______ has the units of mass.

    <p>Density</p> Signup and view all the answers

    ______ is the unit of amount of substance.

    <p>Mole</p> Signup and view all the answers

    Out of the following ______ is a derived unit?

    <p>Newton</p> Signup and view all the answers

    ______ of the following is not a physical quantity.

    <p>Kelvin</p> Signup and view all the answers

    SI unit of pressure is ______.

    <p>N/m²</p> Signup and view all the answers

    ______ is the SI unit of charge.

    <p>Coulomb</p> Signup and view all the answers

    ______ of the following has Hertz as its S.I. unit.

    <p>Frequency</p> Signup and view all the answers

    ______ of the following units is not a derived unit.

    <p>Ampere</p> Signup and view all the answers

    1 gigahertz = ______ kilohertz.

    <p>10^9</p> Signup and view all the answers

    ______ is a dimensionless quantity.

    <p>Refractive index</p> Signup and view all the answers

    ______ = force x time.

    <p>Impulse</p> Signup and view all the answers

    The units of ______ are Newton-second.

    <p>Impulse</p> Signup and view all the answers

    The units of ______ are kg/m³.

    <p>Density</p> Signup and view all the answers

    Out of the following quantities which quantity is measured in m/s²?

    <p>Acceleration</p> Signup and view all the answers

    ______ is the standard unit for length.

    <p>Metre</p> Signup and view all the answers

    The S.I unit of solid angle is ______.

    <p>Steradian</p> Signup and view all the answers

    Units are of ______ types.

    <p>Two</p> Signup and view all the answers

    Acceleration = ______.

    <p>Change in velocity / time</p> Signup and view all the answers

    S.I. stands for ______.

    <p>System Internationale</p> Signup and view all the answers

    One metre = ______ nanometer.

    <p>10^9</p> Signup and view all the answers

    ______ is measured in Joule.

    <p>Energy</p> Signup and view all the answers

    The derived quantity out of the following is ______.

    <p>Force</p> Signup and view all the answers

    1 joule = ______ Erg.

    <p>10^7</p> Signup and view all the answers

    Ampere is the unit of ______.

    <p>Current</p> Signup and view all the answers

    ______ is the derived unit of area.

    <p>m²</p> Signup and view all the answers

    The physical quantities are independent of each other.

    <p>Fundamental</p> Signup and view all the answers

    ______ = distance / time.

    <p>Speed</p> Signup and view all the answers

    ______ is the unit of energy.

    <p>Joule</p> Signup and view all the answers

    The ______ system is also called as metric system.

    <p>Both a and b</p> Signup and view all the answers

    Study Notes

    Important Formulae and Definitions

    • Mean (true) value: calculated by summing all measurements and dividing by the number of measurements.
    • Absolute error: the difference between a measured value and the true value.
    • Mean (average) absolute error: the average of all absolute errors.
    • Relative error: absolute error divided by the true value, expressed as a fraction or percentage.
    • Percentage error: relative error multiplied by 100%.

    Multiple Choice Questions and Answers

    • A physical quantity is any quantity that can be measured.
    • Scalar quantities are defined only by magnitude.
    • Vector quantities are defined by both magnitude and direction.
    • Fundamental units are base units used in a measurement system.
    • Derived units are combinations of fundamental units.
    • Supplementary units are additional units in a system.
    • Examples of physical quantities include mass, length, and time.

    Units and Measurements

    • Units of luminous intensity: Candela.
    • Unit to measure speed: Light year.
    • Unit of heat energy (MKS): Joule.
    • Unit of power (kW-h): kilowatt-hour.
    • Unit of current: Ampere.
    • Unit of force(CGS): dyne.
    • Unit of force(MKS): Newton.
    • Derived quantities include area, volume, and density.
    • SI (System International) units are the most common units for measurements.
    • CGS, FPS, and MKS are other measurement systems.
    • Dimensional analysis is used to determine whether an equation or relationship is dimensionally correct.

    Units and Dimensional Analysis

    • SI units for mass, length, and time are kg, m, and s respectively.
    • Hertz is the SI unit for frequency.
    • Joule/sec and Mole are commonly used units.

    Errors in Measurements

    • Instrumental error arises from faulty instruments.
    • Systematic error is a constant or predictable error.
    • Personal error arises from the observer's limitations.
    • Random error is unpredictable and variable.
    • Significant figures indicate the precision of a measurement.
    • A significant figure is a reliably known digit.
    • Zeroes in between non-zero numbers are considered significant.
    • Zeros at the start of a number are not significant.
    • Zeros at the end of a number are significant if a decimal point is present.

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    Physics MCQ Unit 1 PDF

    Description

    Test your knowledge on important formulae and definitions related to physical quantities and measurements. This quiz covers concepts such as mean values, errors, and different types of units used in measurements. Ideal for students studying physics or related fields.

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