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381b - ‘ The answer is QED According to Faradav's Law the...

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Unformatted text preview: ‘.' The answer is QED According to Faradav's Law, the induced emf on a circuit is directly proportional to the time rate of change of the magnetic flux through the circuit. E. = induced ornf dob E = — —In so," at F = rate of change or mgncli'c fiua through the circuit Choices 'c’ and 'd’ both change the induced emf by changing the rate of change of magnetic flux. HoweverI choice *c’ decreases the rate of change of magnetic flux and would induce to a decreased emf. Changes to the resistance do not change the induced emf within this circuit. [Note however. that quartering the resistance is the change that produces the greatest increase in power. At a given voltage {or emf} the power consumed at a resistor is inverselv proportional to the resistance, P= iv: FR = %.l1uartering the resistance quadmples the power. } WHEN-E ANSWERS on MULTIPLE cHoicE exams are orrsu THE CDRREET ANSWERS roe oussTIous THAT WERE uoT aside. © 2 2005 .J WERE}. ...
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