723_Physics ProblemsTechnical Physics

723_Physics ProblemsTechnical Physics - Chapter 25 k eQ R...

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Chapter 25 63 P25.38 (a) For rR < V kQ R e = E dV dr r =− = 0 (b) For V r e = E dV dr r r r ee =− − F H G I K J = 22 P25.39 Vxx yy z + 53 2 Evaluate E at 10 2 ,, bg E V x xy E V y xz E V z yz E EEE x y z xyz =−+ =+ = − − =− − = = ++= −+ −+= 56 10 5 32 3 1 2 2 5 44 0 2 0 55 0 7 0 7 2222 222 2 af a f af af . NC P25.40 (a) EE E V s AB >= since (b) E V s B = 62 200 a f V 2 cm down (c) The figure is shown to the right, with sample field lines sketched in. FIG. P25.40 P25.41 E V y y y e ++ F H G G I K J J L N M M M O Q P P P A AA ln E y y y + L N M M O Q P P = + A A A 1 2 Section 25.5 Electric Potential Due to Continuous Charge Distributions
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