The flux through a loop of wire changes uniformly from ++40 Wb to −−20 Wb in 1.5 ms. a) What is the significance of the negative number attached to the final flux value? A - final magnetic field direction is the same as that of the initial field B - final magnetic field direction is perpendicular to that of the initial field C - final magnetic field direction is opposite to that of the initial field b) What is the average induced emf in the loop? c) If you wanted to double the average induced emf by changing only the time, what would the new time interval be? d) If you wanted to double the average induced emf by changing only the final flux value, what would it be?
The flux through a loop of wire changes uniformly from ++40 Wb to −−20 Wb in 1.5 ms. a) What is the significance of the negative number attached to the final flux value? A - final magnetic field direction is the same as that of the initial field B - final magnetic field direction is perpendicular to that of the initial field C - final magnetic field direction is opposite to that of the initial field b) What is the average induced emf in the loop? c) If you wanted to double the average induced emf by changing only the time, what would the new time interval be? d) If you wanted to double the average induced emf by changing only the final flux value, what would it be?
Physics for Scientists and Engineers: Foundations and Connections
1st Edition
ISBN:9781133939146
Author:Katz, Debora M.
Publisher:Katz, Debora M.
Chapter32: Faraday’s Law Of Induction
Section: Chapter Questions
Problem 61PQ
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Question
The flux through a loop of wire changes uniformly from ++40 Wb to −−20 Wb in 1.5 ms.
a) What is the significance of the negative number attached to the final flux value?
A - final magnetic field direction is the same as that of the initial field
B - final magnetic field direction is perpendicular to that of the initial field
C - final magnetic field direction is opposite to that of the initial field
b) What is the average induced emf in the loop?
c) If you wanted to double the average induced emf by changing only the time, what would the new time interval be?
d) If you wanted to double the average induced emf by changing only the final flux value, what would it be?
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