ch25-p074 - 74. (a) The length d is effectively shortened...

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74. (a) The length d is effectively shortened by b so C' = ε 0 A /( d – b ) = 0.708 pF. (b) The energy before, divided by the energy after inserting the slab is 2 0 2 0 /( ) / 2 5.00 1.67. / 2 / 5.00 2.00 Ad b UqC C d UqCC A d d b == = = = = ′′ −− (c) The work done is
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