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CG PET Kirchhoff's Voltage Law — practice questions

Explore 2 free Kirchhoff's Voltage Law questions in CG PET Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Kirchhoff's Voltage Law questions and exercises with answers

Showing questions 1–2 of 2.

While tracing a loop **in the direction of current** through a resistor, the potential difference across that resistor is taken:Read the answer and worked solution →An emf source is traversed from its negative to positive terminal while tracing a loop. The EMF contribution to KVL is:Read the answer and worked solution →

Worked practice questions

While tracing a loop **in the direction of current** through a resistor, the potential difference across that resistor is taken:

  1. Positive
  2. Negative
  3. Equal to EMF
  4. Zero
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Correct answer: B. Negative

Tracing along the current direction means moving from higher to lower potential across the resistor — so the potential difference is negative in the KVL equation.

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An emf source is traversed from its negative to positive terminal while tracing a loop. The EMF contribution to KVL is:

  1. $\varepsilon/2$
  2. Positive
  3. Zero
  4. Negative
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Correct answer: B. Positive

Going from − to + inside the source means gaining energy per unit charge → positive contribution. Going from + to − would be negative.

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  1. Choose a Kirchhoff's Voltage Law question and try to work out your answer.
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