P31_089 - 89. (a) The energy needed is UE = uE V = 1 1 2 12...

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89. (a) The energy needed is U E = u E V = 1 2 ² 0 E 2 V = 1 2 (8 . 85 × 10 12 F / m)(100 kV / m) 2 (10 cm) 3 =4 . 4 × 10 5 J . (b) The energy needed is U B = u B V = 1 2 µ 0 B 2 V = (1 . 0T) 2 2(4 π × 10 7 H / m) (10 cm) 3 =4 . 0 × 10 2 J .
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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