a capacitor in an LC oscillator has a maximum potential difference of 17V

  and a maximum energy of 160μJ. When the capacitor has a potential

  difference of 5V and an energy of 10μJ,what are (a)the emf across the

  inductor and (b)the energy stored in the magnetic field?

這題感覺很簡單

可是小弟實在是腦筋打結，不知道該怎麼算

有勞各位高手了Orz

因為明天就要考試

有點緊急>"<

先謝謝大家了<(_ _)>

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