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Karnataka PUC II Current Electricity — practice questions — page 3

Explore 90 free Current Electricity questions in Karnataka PUC II 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 61–90 of 90.

What happens to resistance?Read the answer and worked solution →Tap what affects resistanceRead the answer and worked solution →Current electricity bingoRead 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 →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 →Halving the cross-section area of a conductor makes resistance:Read the answer and worked solution →Tap what affects resistanceRead the answer and worked solution →NEET · Physics · Kirchhoff's LawsRead the answer and worked solution →The resistance inside a cell itself is called its:Read the answer and worked solution →Current electricity numbersRead the answer and worked solution →

Worked practice questions

What happens to resistance?

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Questions
  1. Question
    The wire is made twice as long
    Choices
    1. Doubles
    2. Halves
    3. Unchanged
    Correct choice
    Doubles
  2. Question
    The cross-section area is doubled
    Choices
    1. Doubles
    2. Halves
    3. Unchanged
    Correct choice
    Halves
  3. Question
    Only the colour of the wire changes
    Choices
    1. Doubles
    2. Halves
    3. Unchanged
    Correct choice
    Unchanged
  4. Question
    The area is halved
    Choices
    1. Doubles
    2. Halves
    3. Unchanged
    Correct choice
    Doubles
Instructions
Tap what happens to resistance in each case.
_Source: syllabus Physics, Ch 3 'Current Electricity'_

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Tap what affects resistance

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Questions
  1. Items
    1. Text
      Length of wire
      Matches the category
      Yes
    2. Text
      Cross-section
      Matches the category
      Yes
    3. Text
      The material
      Matches the category
      Yes
    4. Text
      Colour of wire
      Matches the category
      No
    5. Text
      Cost of wire
      Matches the category
      No
    Category
    Affects resistance
  2. Items
    1. Text
      Opposes the field
      Matches the category
      Yes
    2. Text
      Small and slow
      Matches the category
      Yes
    3. Text
      Set by collisions
      Matches the category
      Yes
    4. Text
      Faster than random
      Matches the category
      No
    5. Text
      Along the field
      Matches the category
      No
    Category
    True of drift velocity
Instructions
Tap only the items that belong to the category shown.
_Source: syllabus Physics, Ch 3 'Current Electricity'_

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Current electricity bingo

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Clues and terms
  1. Clue
    What charges in motion constitute.
    Item
    Current
  2. Clue
    Material that carries current in a field.
    Item
    Conductor
  3. Clue
    States that V is proportional to I.
    Item
    Ohm's law
  4. Clue
    SI unit in which resistance is measured.
    Item
    Ohm
  5. Clue
    Property of the material, not its shape.
    Item
    Resistivity
  6. Clue
    The reciprocal of resistivity.
    Item
    Conductivity
  7. Clue
    Slow net motion against the field.
    Item
    Drift velocity
  8. Clue
    Average time between two collisions.
    Item
    Relaxation
  9. Clue
    Says current in equals current out.
    Item
    Junction rule
Instructions
Read each clue and tap the term it describes.
_Source: syllabus Physics, Ch 3 'Current Electricity'_

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