Whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor is Faraday’s
A. first law
B. second law
C. third law
D. fourth law
Answer: A
Share your understanding of this question with the correct explanation.
Whenever the magnetic flux changes with respect to an electric conductor or a coil, an electromotive force (EMF) is induced in the conductor. This statement is known as Faraday’s first law. Therefore, the correct answer is A: “first law.”
Here’s a further explanation:
Faraday’s laws of electromagnetic induction describe the relationship between a changing magnetic field and the induction of an EMF in a conductor. Faraday’s first law, also known as the law of electromagnetic induction, states that whenever the magnetic flux through a circuit or coil changes, an EMF is induced in the conductor.
The magnetic flux (Φ) is a measure of the magnetic field passing through a given area and is given by the product of the magnetic field (B) and the area (A) perpendicular to the field:
Φ = B * A
When there is a change in the magnetic flux, either due to a change in the magnetic field strength or a change in the area, Faraday’s first law states that an EMF will be induced in the conductor. This induced EMF can result in the generation of an electric current if there is a closed circuit for the charges to flow.
Faraday’s first law can be mathematically represented as:
EMF = -dΦ/dt
Here, EMF represents the electromotive force, dΦ/dt represents the rate of change of magnetic flux, and the negative sign indicates the direction of the induced EMF according to Lenz’s law.
Therefore, Faraday’s first law states that whenever the magnetic flux changes with respect to an electric conductor or a coil, an EMF is induced in the conductor.