来源:老师习题 我有问题的是(d)和(e) 光题意都不是很懂@@ 哪位大大可以帮解答? A defibrillator passes a brief burst of current through the heart to restore normal beating. In one such defibrillator, a 50.0-uF capacitor is charged to 6.0 kV. Paddles are used to make an electrical connection to the patient's chest. A pulse of current lasting 1.0 ms partially discharges the capacitor through the patient. The electrical resistance of the patient (from paddle to paddle) is 240 ohm.(a)What is the initial energy stored in the capacitor ? (b) What is the initial current through the patient ? (c ) How much energy is dissipated in the patient during the 1.0 ms ?(d)If it takes 2.0s to recharge the capacitor , compare the average power supplied by the power source to the average power delivered to the patient. (e) Referring to your answer to part (d),explain one reason a capacitor is used in a defibrillator. 感恩~ --

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