Induced Voltage created on a loop entering a magnetic field

AI Thread Summary
The discussion revolves around calculating the induced voltage in a loop as it enters a magnetic field. The loop measures 0.69m by 0.69m and moves at a velocity of 0.81m/s into a magnetic field of 0.21T. The formula for electromotive force (EMF) is provided, but clarification is needed on how to determine the time variable using velocity. It is suggested that the area swept out per second can be used to calculate the change in magnetic flux over time. Understanding these relationships is crucial for solving the problem effectively.
allison20
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Homework Statement



A 0.69m long and 0.69m wide loop is moved at a constant velocity of 0.81m/s from a region of zero magentic field into a perpendicular constant magnetic field of 0.21T. Calculate the magnitude of the induced voltage in the loop while it is entering the B-field

Homework Equations


EMF=-N*A*B/T


The Attempt at a Solution


I can plug in the numbers for the number of loops N (1), the area A (LxW), and the magnitude of the field B (.21T), but how do I find the time from just knowing the velocity?
 
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welcome to pf!

hi allison20! welcome to pf! :smile:
allison20 said:
EMF=-N*A*B/T

no, it's -∂/∂t (NAB) :wink:

(ie -∂/∂t (magnetic flux) )
 
If you know the velocity and dimensions you should be able to calculate area swept out per second and therefore flux change per second
 

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