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JEECUP (UP Polytechnic) Conservation Laws — practice questions

Explore 2 free Conservation Laws questions in JEECUP (UP Polytechnic) Physics. Open each question or exercise to read its content, reference answers and available explanation.

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Conservation Laws questions and exercises with answers

Showing questions 1–2 of 2.

Kirchhoff's first law (junction law) is a consequence of:Read the answer and worked solution →Kirchhoff's second law (voltage/loop law) is a consequence of:Read the answer and worked solution →

Worked practice questions

Kirchhoff's first law (junction law) is a consequence of:

  1. Newton's third law
  2. Conservation of energy
  3. Ohm's law
  4. Conservation of charge
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Correct answer: D. Conservation of charge

KCL ensures that charge does not accumulate at a junction — what enters must leave. It is a direct expression of **charge conservation**.

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Kirchhoff's second law (voltage/loop law) is a consequence of:

  1. Ampere's law
  2. Conservation of energy
  3. Conservation of momentum
  4. Conservation of charge
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Correct answer: B. Conservation of energy

Going around a closed loop, the net work done on a charge by all EMFs minus the resistive drops must be zero — i.e. energy is conserved.

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