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发表于 1-2-2008 06:56 PM
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显示全部楼层
二月了，时间不多，就只剩8个月就大考了。
看到酱的贴，就应该推上来，让大家受益。
小弟先出题，希望大家也能大公无私地分享题目。
A capasitor is connected in series to a 24.0V battery and a 150k ohm resistor. the time constant is measured to be 5.4s.
when the capacitor is fully charged, the battery is then removed from the circuit. the end of the wires are joined to enable the capacitor to discharge through the resistor. How long does it take for the energy stored in the capacitor to reach half its maximum value? |
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