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Electric Circuits 8th Edition 70

Electric Circuits 8th Edition 70 - this aspect of...

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Cncuit Elements objective 3-Know how to calcutate pow6r for each etement in a simple circuit 2.9 For the circuit shown find (a) the currentir in microamperes, (b) thc voltage o in volls, (c) the iotal power gcncratcd, and (d) the total power absorbed. Answer: (a) 25 /..A; (b) 2 v: (c) 61s0 /,w; (d) 61s0 /..w. c) ihe power delivered by the independent cur- renl source! d) the power delivered by the contlolledcur- rent source, €) the lolal power dissipaled in the lrvo rcsislors. Answer: (a) 70 V; (b) 210 w (c) 300 w; (d) 40 w; (e) 130 w 2,10 The currentt{ in the circuit sho*n is 2A. Calculate b) Lhe power absoibed by the independent vollage source, NOTE: Also tt| Chapter Prcblems 2.21 und 2.28. Practical Perspective ttectrical Safety At thebeginning of this chaptet we said that current through thebody can caus€ injury. Lefs examine
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Unformatted text preview: this aspect of etectricaI safety. You might thjnk that etectrjcaI jnjury is due to burrs. However, that is not the case, The most common etectricat jnjury js to the n€rvous system. Nerves use etectrochernical signats, and etectrjc currents can disrupt those signats. When the current path jnctudes onLy sketetaI musctes, the effects can inctude temporary paratysis (cessation of neruous signats) or involun-tary muscle contractions, which are generalty not fife threatening. Howevet when the current path jncLudes nerves and muscLes that controL th€ supply of oxygen to the brain, the problem js much more se ous. Temporary paral ysis of these musctes can stop a pe6on from breathing, and a sudden mus-cLe contraction can disruDt the siona[s that reoutate heartb€at. The resutt is...
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