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Answer: c
Explanation: The input voltage is given constant, which results in the constant magnetic
flux. The magnetic flux is independent of the excitation.
The relation of the input voltage (V) with the magnetic flux (Φ) in a coil is described by Faraday’s Law of Electromagnetic Induction. According to this law, the induced voltage in a coil is proportional to the rate of change of magnetic flux through the coil. Mathematically, it can be expressed as:
[ V = -frac{dΦ}{dt} ]
where:
– ( V ) is the induced voltage,
– ( Φ ) is the magnetic flux, and
– ( frac{dΦ}{dt} ) is the rate of change of magnetic flux over time.
The negative sign indicates the direction of the induced voltage, as described by Lenz’s Law, which states that the induced voltage will be in a direction that opposes the change in magnetic flux.
Answer: c
Explanation: The input voltage is given constant, which results in the constant magnetic flux. The magnetic flux is independent of the excitation.