Phy 122
Your 'question form' report has been received. Scroll down through the document to see any comments I might have inserted, and my final comment at the end.
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I am studying for the fourth exam and I have a few questions. On the Magnetism problem set #12 the question asks to calculate the average voltage. Whether I calculate the average voltage as outlined in the solution of I use the equation for avg. voltage listed in the generalized solution I come up with an average voltage of 109.5 V. In the listed solution you have it as twice this amount; about 219 V. Why is this doubled in your solution? Am I missing something?
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in my equation I used the formula: avg. voltage = 4f*(B*A)
= 4(4.5)(.4T)(15.21 m^2) = 109. 5V
Or in the alternative equation:
1/4.5 Hz = .2222 seconds for 360 rotation; x 1/4 = .05555 seconds
magnitude of flux change = 6.084 T m^2/ .05555 = 109.5 V
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The number given by the program does seem to be double the correct value. 6.084 / .05555 is 109.5, not 219.
The random generator sometimes gets ahold of the wrong numbers, so the arithmetic in the Intro Problem Sets isn't 100% reliable. I believe the process shown in the solutions is reliable.