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EMF about a loop moving toward a wire with current
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[QUOTE="TSny, post: 5454664, member: 229090"] I think they want an expression for the emf at the instant when the left side of the loop is a distance r from the current. What is the value of t for this instant? I think your signs are OK. The overall sign of the emf doesn't have meaning unless you state your convention for "positive" emf. Should the overall sign of the emf change if the loop moves away from the current instead of toward the current? "B doesn't change" is assuming that the current isn't changing. So, at a fixed location is space, B doesn't change with time. Of course, B does change inside the loop because the loop is changing its location. [/QUOTE]
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EMF about a loop moving toward a wire with current
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