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WHomework set 12_solns_2011

WHomework set 12_solns_2011 - Homework set 12 Problems 21.1...

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Homework set # 12 Problems: 21.1, 34, 35, 37, 41 Solutions: 21.1 (a)     max rms 2 2 100 V 141 V VV  (b) rms rms 100 V 20.0 A 5.00 V I R  (c) max max 141 V 28.3 A 5.00 V I R or   max rms 2 2 20.0 A 28.3 A II (d)  2 23 av rms 20.0 A 5.00 2.00 10 W 2.00 kW IR P 21.34 (a) 2 2, rms 1, rms 1 N N  so 2, rms 21 1, rms 9.0 V 240 turns 18 turns 120 V V NN V    (b) For an ideal transformer,       av av 2, rms 2, rms input ouput VI PP Thus,      av 9.0 V 0.400 A 3.6 W input P
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21.35 The power input to the transformer is      5 1, rms 1, rms 3 600 V 50 A 1.8 10 W input VI    P For an ideal transformer,       av 2, rms 2, rms av ouput input PP so the current in the long-distance power line is    5 av 2, rms 2, rms 1.8 A 100 000 V input I V  P The power dissipated as heat in the line is then P 2 22 2, rms 1.8 A 100 3.2 10 W lost line IR
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WHomework set 12_solns_2011 - Homework set 12 Problems 21.1...

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