Peak EMF in Generator Coil at 90.0 Hz: 0.012V

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The discussion centers on calculating the peak electromotive force (emf) in a generator with a 170-turn square coil rotating at 90.0 Hz in Earth's magnetic field of 5*10^-5 T. The formula used is emf = NBAw, with N as the number of turns, B as the magnetic field strength, A as the area of the coil, and w as the angular frequency. The calculated emf is 0.012V, but there is confusion regarding the expected answer, with suggestions of 12.0 mV and 10 mV also being deemed incorrect. The discrepancy highlights issues with the precision of the expected answer in the context of the problem. Ultimately, the discussion reveals challenges in achieving the correct emf value as per the requirements of the physics problem.
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Homework Statement


A generator has a 170-turn square coil, 5 cm on a side.
Find the peak emf in this coil when it's rotating at 90.0 Hz in Earth's field, 5*10^-5 T
Express your answer to one significant figure and include the appropriate units.

Homework Equations



Emf = NBAw

The Attempt at a Solution



N = 170
B = 5*10^-5
A = 0.05^2 = 0.0025m^2
w = 2*pi*f = 565.49

subbing in, emf = 0.012V




BUT. mastering physics is telling me its wrong.
 
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Try 12.0 mV.
 
nope, wrong.
 
nevermind, its 10mV... they don't seem to care for accuracy.
 
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