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AP Intermediate 2nd Year Current Electricity — practice questions — page 2

Explore 88 free Current Electricity questions in AP Intermediate 2nd Year 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 31–60 of 88.

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 →An electric current is constituted by:Read the answer and worked solution →Materials that carry current when a field is applied are:Read the answer and worked solution →Ohm's law states that V is proportional to:Read the answer and worked solution →Doubling the length of a conductor makes its resistance:Read the answer and worked solution →Halving the cross-section area of a conductor makes resistance:Read the answer and worked solution →The resistance inside a cell itself is called its:Read the answer and worked solution →Resistance is inversely proportional to the conductor's:Read the answer and worked solution →The average time between electron collisions is called:Read the answer and worked solution →The drift velocity of electrons points:Read the answer and worked solution →Drift velocity is small compared with the electrons':Read the answer and worked solution →Internal resistance of a cell may be neglected when it is:Read the answer and worked solution →Compared with electrolytic cells, dry cells have internal resistance that is:Read the answer and worked solution →Two cells joined can be replaced by one cell of equivalent:Read the answer and worked solution →How many rules did Kirchhoff give for circuit analysis?Read the answer and worked solution →Kirchhoff's junction rule for currents I1, I2 into a junction gives:Read the answer and worked solution →The quantity denoted by sigma, the inverse of resistivity, is:Read the answer and worked solution →Resistance depends on the material and on the conductor's:Read the answer and worked solution →If two identical slabs are joined end to end, the combined resistance is:Read the answer and worked solution →Match the current termRead the answer and worked solution →Raises or lowers resistance?Read the answer and worked solution →True or false about current electricityRead the answer and worked solution →Current electricity numbersRead the answer and worked solution →Complete Ohm's lawRead the answer and worked solution →What happens to resistance?Read the answer and worked solution →Tap what affects resistanceRead the answer and worked solution →

Worked practice questions

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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Order the chain: field to current

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Steps
  1. A potential difference sets up an electric field in the conductor
  2. The field pushes on the free electrons
  3. Collisions with ions stop them accelerating without limit
  4. They settle to a steady average drift velocity
  5. That drift of charge across the cross-section is the current
The chapter's derivation, told as a sequence. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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True or false: circuits and sources

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Questions
  1. Statement is true
    Yes
    Statement
    A steady current requires a closed circuit.
  2. Statement is true
    Yes
    Statement
    The source moves charge from lower to higher potential energy.
  3. Statement is true
    No
    Statement
    A real source has zero internal resistance.
  4. Statement is true
    Yes
    Statement
    The external voltage is ε R ÷ (R + r).
  5. Statement is true
    No
    Statement
    Internal resistance can be ignored for accurate work.
How a real cell behaves in a circuit. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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