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PUCET (Punjab) Current Electricity — practice questions — page 4

Explore 97 free Current Electricity questions in PUCET (Punjab) 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 91–97 of 97.

Spot the one that does not belongRead the answer and worked solution →Reading the definitions backRead the answer and worked solution →Property of the object or of the substance?Read the answer and worked solution →Order the chain: field to currentRead the answer and worked solution →True or false: circuits and sourcesRead the answer and worked solution →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

Spot the one that does not belong

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Questions
  1. Items
    1. Junction rule
    2. Loop rule
    3. Ohm's law
    Odd item
    Ohm's law
  2. Items
    1. Rubber
    2. Copper
    3. Silver
    Odd item
    Rubber
  3. Items
    1. Resistance
    2. Current density
    3. Resistivity
    Odd item
    Current density
  4. Items
    1. Silicon
    2. Germanium
    3. Glass
    Odd item
    Glass
Grouped by which summary point each comes from. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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Reading the definitions back

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Questions
  1. Question
    The unit of resistance is the
    Choices
    1. volt
    2. coulomb
    3. ohm
    Correct choice
    ohm
  2. Question
    Resistance R relates to length l and area A as
    Choices
    1. ρl/A
    2. ρA/l
    3. ρlA
    Correct choice
    ρl/A
  3. Question
    Current density j equals
    Choices
    1. nq/v_d
    2. nqv_d
    3. qv_d/n
    Correct choice
    nqv_d
  4. Question
    Which has the highest resistivity?
    Choices
    1. Copper
    2. Silicon
    3. Glass
    Correct choice
    Glass
Straight recall of the chapter's core definitions. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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Property of the object or of the substance?

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Items
  1. Item
    Resistance R
    Category
    Depends on the sample
  2. Item
    Changes if the wire is made longer
    Category
    Depends on the sample
  3. Item
    Changes if the wire is made thicker
    Category
    Depends on the sample
  4. Item
    Resistivity ρ
    Category
    Property of the material
  5. Item
    Same for any piece of copper
    Category
    Property of the material
Categories
  1. Item
    Depends on the sample
  2. Item
    Property of the material
Resistance changes if you cut the wire resistivity does not. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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