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1. A single strand of wire of adjustable length is wound around the circumference of a round balloon that has a diameter of 1

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Answer #1

Concept - use Faraday’s law of electromagnetic induction to find the EMF induced in the loop as shown below,

Es ro - B(AA? At = - 8 - 1), At put r2 = 0.14 m V = 0.09m B= 1.25 At = 0.0445 LEL = 1.985v

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