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Introductory Physics Homework Help
Why Does the Trigonometric Function in the FEM Calculation Differ?
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[QUOTE="LCSphysicist, post: 6518141, member: 675151"] [B]Homework Statement:[/B] .. [B]Relevant Equations:[/B] .. I need to find the FEM induced in a coil that rotates around the y-axis and is inside a solenoid. The coil starts in the plane yz ##r## is the radius of the coil ##n## is the number of spiral by length of the solenoid. ##N## is the number of turns of the coil ##w## is the angular velocity that the coils rotate. ##I## is the current passing through the solenoid I just thought this: $$\phi = \langle B,A \rangle = \mu n I \pi r^2 N cos(\theta = wt)$$ $$ \epsilon = -\dot \phi = \mu n I \pi r^2 N w sin(\theta = wt)$$ This is a simple exercise. But i can't see why my answer is wrong. That is, the answer provided by the list is ## \mu n I \pi r^2 N w cos(\theta = wt)##. The trignometric function is different. My answer says that at t=0 the induced FEM is zero, the other says it is maximum. [/QUOTE]
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Why Does the Trigonometric Function in the FEM Calculation Differ?
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