ExamIGJSolutions

# ExamIGJSolutions - ExamIsolutions...

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Exam I solutions Wednesday, September 30, 2009 7:25 PM Exam I Page 1

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5. [10 pts] The resonant frequency of a series RLC circuit driven by an oscillating voltage,    o Cos( t), is greater than the driving frequency . Does the current lead or lag the emf? Your answer will be graded on your explanation which should include a sketch of the circuit, a phasor diagram of the circuit, and a comparison of the magnitude of V L and V C , the peak voltages across the inductor and capacitor. Pasted from < file:///C:\Greg\Teaching\Phys270\Sync\Quizzes\ExamI.doc > Exam I Page 2
6. [15 pts] A long wire carrying a current I is charging a large circular parallel plate capacitor with radius R as shown below. Derive an expression for the magnitude of the magnetic field midway between the parallel plate capacitors at a distance r from the center where r<R (at point P2). Pasted from < file:///C:\Greg\Teaching\Phys270\Sync\Quizzes\ExamI.doc > [3 pts] Write a vector expression of the electric field for arbitrary time t and position z. a. 4. [15 pts] An electromagnetic plane wave with wavelength and period T travels in the +z-direction in vacuum where the electric field is polarized in the x-direction and

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## This note was uploaded on 12/26/2011 for the course PHYSICS 270 taught by Professor Drake during the Fall '08 term at Maryland.

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ExamIGJSolutions - ExamIsolutions...

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