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OJEE Faraday's Law — practice questions

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Faraday's Law questions and exercises with answers

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Faraday's law of electromagnetic induction (in its quantitative form, with sign) is:Read the answer and worked solution →

Worked practice questions

Faraday's law of electromagnetic induction (in its quantitative form, with sign) is:

  1. $e = \phi / t$
  2. $e = \phi \cdot dt$
  3. $e = -d\phi/dt$
  4. $e = +d\phi/dt$
Show answer and solution

Correct answer: C. $e = -d\phi/dt$

The induced EMF equals the **negative** rate of change of magnetic flux through the circuit: $e = -d\phi/dt$. The minus sign embeds Lenz's law — direction of induced EMF opposes the flux change.

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