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Faraday's Law

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Induced EMF magnitude equals rate of change of:

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Voltage

Charge

Magnetic flux

Resistance

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Subject: physics
Chapter: electromagnetic induction and ac
Topic: faraday's law
Difficulty: Easy
Year: 2025

Solution

Correct Answer:

Magnetic flux

Faraday's Law of Electromagnetic Induction states that the magnitude of the electromotive force (EMF) induced in a circuit is directly proportional to the time rate of change of the magnetic flux ( $Φ_{B}$ ) through the circuit. $∣ E ∣ = \frac{d Φ _{B}}{d t}$

Magnetic flux $Φ_{B} = B \cdot A = B A cos θ$ .
Changing $B$ , $A$ , or the orientation $θ$ will induce an EMF.

This easy difficulty physics question is from the chapter electromagnetic induction and ac, covering the topic of faraday's law. It appeared in the 2025 exam.

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Faraday's Law

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