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BITSAT Current Electricity — practice questions — page 3

Explore 62 free Current Electricity questions in BITSAT Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Current Electricity questions and exercises with answers

Showing questions 61–62 of 62.

Assertion and reason: circuitsRead the answer and worked solution →Tap every quantity the chapter treats as material-dependentRead the answer and worked solution →

Worked practice questions

Assertion and reason: circuits

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Questions
  1. Reason
    At the null point the four resistances satisfy a fixed ratio.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    A Wheatstone bridge can measure an unknown resistance.
  2. Reason
    Charge cannot accumulate at a junction in a steady current.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Kirchhoff's junction rule follows from conservation of charge.
  3. Reason
    Kirchhoff's loop rule sums potential changes to zero.
    Verdict
    Both are true; the reason does not explain the assertion.
    Assertion
    Metals have low resistivity.
The last round pairs two true statements that do not explain one another. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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Tap every quantity the chapter treats as material-dependent

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Questions
  1. Items
    1. Text
      Resistivity
      Matches the category
      Yes
    2. Text
      Temperature coefficient of resistivity
      Matches the category
      Yes
    3. Text
      Number density of carriers
      Matches the category
      Yes
    4. Text
      Length of the wire
      Matches the category
      No
    5. Text
      Cross-sectional area
      Matches the category
      No
    Category
    Depends on the material itself
Separating what belongs to the substance from what belongs to the wiring. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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