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Karnataka PUC II Current Electricity — practice questions

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 1–30 of 90.

Ohm's law for a conductor states that, at a given temperature,Read the answer and worked solution →The SI unit of resistance isRead the answer and worked solution →The resistance R of a uniform conductor of length l and cross-section A made of material with resistivity ρ isRead the answer and worked solution →A cell of emf ε = 6 V and internal resistance r = 1 Ω drives a current through an external resistance R = 5 Ω. The current in the circuit isRead the answer and worked solution →In the relation between current density j and electric field E inside an ohmic conductor,Read the answer and worked solution →Two identical resistors each of resistance R are connected in parallel. The equivalent resistance isRead the answer and worked solution →Kirchhoff's junction (or current) rule is a statement ofRead the answer and worked solution →Kirchhoff's loop (or voltage) rule is a statement ofRead the answer and worked solution →A 12 V battery with internal resistance 2 Ω is connected across a 4 Ω resistor. The TERMINAL voltage of the battery isRead the answer and worked solution →NEET · Physics · Kirchhoff's LawsRead the answer and worked solution →Fuse equal resistors in parallelRead the answer and worked solution →True or false: what emf actually isRead the answer and worked solution →Complete the statement of Ohm's lawRead the answer and worked solution →Tap every way Ohm's law can failRead the answer and worked solution →Match each device or material to its behaviourRead the answer and worked solution →Sort each material by its resistivityRead the answer and worked solution →Complete the resistance relationRead the answer and worked solution →True or false: resistance and resistivityRead the answer and worked solution →Match each of Kirchhoff's rules to what it conservesRead the answer and worked solution →Kirchhoff's rulesRead the answer and worked solution →Order the steps: find an unknown resistance with a Wheatstone bridgeRead the answer and worked solution →True or false: internal resistanceRead the answer and worked solution →Which quantity is which?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Charge carriersRead the answer and worked solution →Two are true, one is notRead the answer and worked solution →Three of these are wrong. Find the one that holds.Read the answer and worked solution →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 →

Worked practice questions

Ohm's law for a conductor states that, at a given temperature,

  1. V is independent of I
  2. V is directly proportional to I, so V = IR with R constant
  3. V is inversely proportional to I
  4. V = I² · R
Show answer and solution

Correct answer: B. V is directly proportional to I, so V = IR with R constant

V ∝ I, hence V = IR with R the constant resistance at fixed temperature.

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The SI unit of resistance is

  1. Volt
  2. Ampere
  3. Ohm (Ω)
  4. Coulomb per second
Show answer and solution

Correct answer: C. Ohm (Ω)

1 ohm = 1 volt / 1 ampere. Volt is potential, ampere is current, coulomb/second is current.

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The resistance R of a uniform conductor of length l and cross-section A made of material with resistivity ρ is

  1. R = ρ A / l
  2. R = ρ l A
  3. R = ρ l / A
  4. R = l / (ρ A)
Show answer and solution

Correct answer: C. R = ρ l / A

R = ρ · l/A. Doubling length doubles R; doubling area halves R.

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