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RPF Constable Physics and Measurement — practice questions — page 2

Explore 35 free Physics and Measurement questions in RPF Constable Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Physics and Measurement questions and exercises with answers

Showing questions 31–35 of 35.

Assertion and reason: unitsRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Flip and pair: derived unit with what it measuresRead the answer and worked solution →Order the steps: build a derived unitRead the answer and worked solution →Counting the base unitsRead the answer and worked solution →

Worked practice questions

Assertion and reason: units

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Questions
  1. Reason
    SI is an internationally accepted system of standardised units.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    The same measurement means the same thing worldwide.
  2. Reason
    It is built from length and time, which are the base ones.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Speed is not a base quantity.
  3. Reason
    SI rests on seven base units.
    Verdict
    The assertion is false and the reason is true.
    Assertion
    The joule is a base unit.
The reason must genuinely explain the assertion. Source: syllabus Physics, Ch 1 Units and Measurement.

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Two are true, one is not

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Questions
  1. False statement
    The newton is a base unit
    Statements
    1. SI has seven base units
    2. The newton is derived
    3. The newton is a base unit
  2. False statement
    The mole measures luminous intensity
    Statements
    1. The mole measures luminous intensity
    2. The candela measures luminous intensity
    3. The mole measures amount of substance
  3. False statement
    Units differ between countries in SI
    Statements
    1. Units are standardised by agreement
    2. Units differ between countries in SI
    3. Physics rests on measurement
The false line miscounts or misclassifies. Source: syllabus Physics, Ch 1 Units and Measurement.

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Flip and pair: derived unit with what it measures

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Matching pairs
  1. A
    newton
    B
    force
  2. A
    joule
    B
    energy
  3. A
    watt
    B
    power
  4. A
    metre
    B
    length
The named derived units. Source: syllabus Physics, Ch 1 Units and Measurement.

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