The area of the coil and the variation in the magnetic field both affect the induced current. The area A that each loop in a coil of wires adds to the right-hand side of the equation ensures that the induced emf is proportionate to the number of loops in the coil.
Imagine a flux line going straight into each of the x's on the board when a coil of wire attached to an ammeter is set in a steady magnetic field. The Coil Area slider can be moved to change the coil's area, which changes the area inside the coil through which the magnetic field is passing. There is an electric current generated when the slider is moved, as indicated by the ammeter, and the direction of the current is indicated by the ammeter reading (positive or negative) and the accompanying black arrows. Observe that the speed at which you change the coil form slider affects how soon the ammeter responds.
Given that an induced current's intensity largely depends on when the coil is adjusted quickly, the magnetic flux changes more quickly than when it is adjusted slowly, giving rise to higher values on the ammeter.
If a conducting loop is subjected to a fluctuating magnetic field, a current can be induced in the loop. The magnetic field's strength can be changed, the conductor can be moved in and out of the field, the distance between a magnet and the conductor can be changed, or the area of a loop in a steady magnetic field can be altered. Whatever method is used to create the variation, the end consequence, an induced current, remains the same. According to Faraday's law of induction, the current's intensity will fluctuate in direct proportion to the change in magnetic flux.
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