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ISC Class 12 Current Electricity — practice questions — page 2

Explore 67 free Current Electricity questions in ISC Class 12 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 67.

Tap every statement true of drift velocityRead the answer and worked solution →Complete the temperature coefficient definitionRead the answer and worked solution →Flip and pair: symbol with quantityRead the answer and worked solution →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 →Materials that carry current when a field is applied are: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 →What happens to resistance?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 bingoRead the answer and worked solution →An electric current is constituted by: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 →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 →Complete Ohm's lawRead the answer and worked solution →Kirchhoff's junction rule for currents I1, I2 into a junction gives:Read the answer and worked solution →

Worked practice questions

Tap every statement true of drift velocity

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Questions
  1. Items
    1. Text
      It is an average velocity of the carriers
      Matches the category
      Yes
    2. Text
      It is proportional to the applied field
      Matches the category
      Yes
    3. Text
      It arises because electrons collide with ions
      Matches the category
      Yes
    4. Text
      It equals the speed of light
      Matches the category
      No
    5. Text
      It grows without limit under a steady field
      Matches the category
      No
    Category
    True of drift velocity
The collision picture is what makes drift velocity, rather than acceleration, the right quantity. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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Complete the temperature coefficient definition

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Missing parts
  1. Answer
    fractional
    Choices
    1. fractional
    2. absolute
    3. squared
  2. Answer
    temperature
    Choices
    1. temperature
    2. current
    3. length
Complete the statement
The temperature coefficient of resistivity is the {0} increase in resistivity per unit increase in {1}.
As the chapter defines it, over the range where resistivity is linear in temperature. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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Flip and pair: symbol with quantity

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Matching pairs
  1. A
    I
    B
    current
  2. A
    ρ
    B
    resistivity
  3. A
    R
    B
    resistance
  4. A
    ε
    B
    emf
  5. A
    r
    B
    internal resistance
  6. A
    v_d
    B
    drift velocity
The chapter's notation. Source: syllabus Physics Part I, Ch 3 Current Electricity.

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