Question

ANSWER ALL THE QUESTIONS Question 1 For the circuit shown in Figure Q1, select a value of R so that the energy stored in the inductor is equal to the energy stored in the capacitor at steady state. 22 Ω 10mH 15v (t Figure Q1 (5 marks) Question 2 For the network in Figure Q2. (a) Find the mathematical expressions for the voltage yz and the current ic following the (9 marks) (4 marks) closing of the switch. (b) Sketch the waveforms of yy and i obtained in part (a). (c) Determine the mathematical expre ssion for the voltage vis following the closing of (2 marks) the switch, and sketch the waveform. + 5 H 10 kn R2 315 k 30V Figure Q2

Answer 1

'〉 Under Steady state , the circuit L. IS v cl CU 2 3 2 2. We know, R.

As switchis open b4*u whan Switih losed SH lo k lSk 1Sk m A Reą 6xio i(t)- 3(ie

For VL. lok 30v T L- d.t - 6oot 600 t V V ( 18V 3mA-- - -

Voltage din s ion с〉, By Зон 35 S+ S 2 6oot Vi3 (t)

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