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958_Physics ProblemsTechnical Physics

# 958_Physics ProblemsTechnical Physics - Chapter 34(a...

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Chapter 34 299 P34.22 (a) efficiency useful power output total power input W 1 400 W = × = F H G I K J × = 100% 700 100% 50 0% . (b) S A av 2 W 0.068 3 m m W m = = = × P 700 0 038 1 2 69 10 5 b gb g . . S av 2 kW m toward the oven chamber = 269 (c) S E c av = max 2 0 2 µ E max . . . . = × × × = × = 2 4 10 3 00 10 2 69 10 1 42 10 14 2 7 8 5 4 π T m A m s W m V m kV m 2 e je je j P34.23 (a) B E c max max = : B max . . . = × × = 7 00 10 3 00 10 2 33 5 8 N C m s mT (b) I E c = max 2 0 2 µ : I = × × × = 7 00 10 2 4 10 3 00 10 650 5 2 7 8 . . e j e je j π MW m 2 (c) I A = P : P = = × × L N M O Q P = IA 6 50 10 4 1 00 10 510 8 3 2 . . W m m W 2 e j e j π P34.24 (a) I = × × = 10 0 10 4 97 3 3 2 . . e j e j W 0.800 10 m kW m 2 π (b) u I c av 2 3 J m s m s J m = = × × = 4 97 10 3 00 10 16 6 3 8 . . . µ P34.25 (a) E
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