Final answer:
The average induced electromotive force (emf) in a coil moved quickly from a magnetic field to a non-magnetic region can be calculated using Faraday's Law of electromagnetic induction. As the coil is moved quickly, the magnetic flux through the coil decreases rapidly, leading to a relatively high induced emf.
Step-by-step explanation:
The question asks about the average electromotive force (emf) induced in a coil when it is quickly pulled from a magnetic field to a region with no magnetic field. The emf is related to the rate of change of the magnetic field. This is described by Faraday's Law of electromagnetic induction, which states that the induced emf in a circuit is directly proportional to the time rate of change of the magnetic flux through the circuit.
In this case, if the coil is moved to a region without a magnetic field, the magnetic flux through the coil is decreasing. The magnitude of the induced emf can be calculated by the formula emf = -N ΔΦ/Δt, where N is the number of turns in the coil, ΔΦ is the change in magnetic flux, and Δt is the change in time. Note the negative sign, which is due to Lenz's law and indicates that the induced emf will act in such a way to oppose the change in flux.
To apply this formula, we would need to know N (the number of turns in the coil) and ΔΦ (the change in magnetic flux). If this information isn't available, we can still say that generally, the faster the coil is moved (i.e., the shorter the time Δt), the greater the induced emf will be. So, in this case, the fast movement of the coil (over 0.14 seconds) would lead to a relatively high induced emf.
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