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JEE Advanced — free MCQ practice

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Worked practice questions

Kirchhoff's Voltage Law is based on conservation of

  1. charge
  2. energy
  3. mass
  4. electric field only at nodes
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Correct answer: B. energy

KVL is based on conservation of energy. As a test charge goes around a closed loop, the net change in electric potential energy must be zero.

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According to Kirchhoff's Voltage Law, the algebraic sum of all potential differences around a closed loop is

  1. equal to the total current in the loop
  2. always positive
  3. zero
  4. equal to the resistance of the loop
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Correct answer: C. zero

Kirchhoff's Voltage Law states that the algebraic sum of all emfs and voltage drops around any closed loop is zero. This expresses conservation of energy in circuits.

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Kirchhoff's Current Law is a direct consequence of conservation of

  1. energy
  2. charge
  3. momentum
  4. resistance
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Correct answer: B. charge

KCL follows from conservation of charge. Since charge cannot accumulate indefinitely at an ideal junction, the total current entering must equal the total current leaving.

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