problem29_31

problem29_31 - 29.31: a)  W = ∫ F ⋅ dl = qE 2πR =...

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Unformatted text preview: 29.31: a)  W = ∫ F ⋅ dl = qE 2πR = (6.50 × 10 −6 C)(8.00 × 10−6 V m)2π (0.0350 m) = 1.14 × 10−11 J. (b) For a conservative field, the work done for a closed path would be zero. dΦ B di ⇒ EL = BA . A is the area of the solenoid. (c)  ∫ E ⋅ dl = − dt dt For a circular path: di E 2πr = BA = constant for all circular paths that enclose the solenoid. dt So W = qE 2πr = constant for all paths outside the solenoid. W = 1.14 × 10 −11 J if r = 7.00 cm. ...
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