ch30-p028 - 28. Eq. 27-23 gives /R as the rate of energy...

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28. Eq. 27-23 gives ε 2 / R as the rate of energy transfer into thermal forms ( dE th /dt , which, from Fig. 30-55(c), is roughly 40 nJ/s). Interpreting as the induced emf (in absolute value) in the single-turn loop ( N = 1) from Faraday’s law, we have () B d dBA dB A dt dt dt Φ == = . Eq. 29-23 gives B = µ o ni for the solenoid (and note that the field is zero outside of the solenoid – which implies that A = A coil ), so our expression for the magnitude of the induced emf becomes
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This note was uploaded on 06/03/2011 for the course PHY 2049 taught by Professor Any during the Spring '08 term at University of Florida.

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