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Karnataka PUC II Science Current Electricity — practice questions

Explore 56 free Current Electricity questions in Karnataka PUC II Science 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 56.

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 →The reciprocal of resistivity ρ is calledRead 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 →A Wheatstone bridge with arms P, Q, R and S is balanced whenRead the answer and worked solution →NEET · Physics · Kirchhoff's LawsRead the answer and worked solution →Match electrical quantities to unitsRead the answer and worked solution →Order the steps for resistors in seriesRead the answer and worked solution →True or False: Current Electricity (ISC 12)Read the answer and worked solution →Match the Formula: Current Electricity (ISC 12)Read the answer and worked solution →Solve three resistance networksRead the answer and worked solution →Split Kirchhoff's two circuit lawsRead the answer and worked solution →Sort Kirchhoff's rules by their lawRead the answer and worked solution →Fuse equal resistors in parallelRead the answer and worked solution →Merge equal resistors in seriesRead the answer and worked solution →Split the two circuit lawsRead the answer and worked solution →Current electricity bingoRead the answer and worked solution →Pick the right unit or ruleRead the answer and worked solution →Complete the current lawsRead the answer and worked solution →Current electricity: true or false?Read the answer and worked solution →Pick the bridge facts, fastRead the answer and worked solution →Complete the bridge storyRead the answer and worked solution →Knock out the bridge mythsRead the answer and worked solution →Flip and match the circuit toolsRead 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
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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
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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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