Charging and Discharging of capacitor

?作业考试练习?美国物理杯赛(Physics Bowl)?Charging and Discharging of capacitor

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习题练习：Charging and Discharging of capacitor

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09.36: For the RC circuit shown, the resistance is R = 0.10 R, they x0s. fq(fozs)s6tt7w2ra5 q capacitance is C =5.0 F and the battery has(5tayorst 06 f7 .sqs2 qw)zxf voltage ξ=12 V. The capacitor is initially uncharged when the switch S is closed at time t=0. At sometime later, the current in the circuit is 0.50 A. What is the magnitude of the voltage across the capacitor at that moment?

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.41: For the circuits shown below, which will take the least time to chd )7y)h6 d1he;qfpo usarge the capacitor(s) to 90% of the full charge? All batteries are ideal and identical with EMF ξ , all resistors are ideeh ouf pys16)d7h dq;)ntical with resistance R , and all capacitors are identical with capacitance C and are initially uncharged.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.38: In the circuit shoos t 8l*5hvy6 d0kgx+wwn,the switch S has been left open for a very longtime. All circuits elements are considered to be ideal. Which onvx68sg+k lt woydh50*e of the following statements best describes the behavior of the current through the switch S once it is closed?

A. The current initially is 12 mA and decreases to a steady 3 mA.

B. The current initially is 3 mA and increases to a steady 12 mA.

C. The current initially is 9 mA and decreases to a steady 3 mA.

D. The current initially is 6 mA and decreases to a steady 3 mA.

E. The current is a steady 3 mA.

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单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.45: The switch S in the RC circuit shown is closed at time t=0. Af8t,,.q 6r we :wpnov6a gtalfpop 77.ll circuit elements are ideal and R=10.0Ω, C=2.20 F and ξ = 12.0 V. The capacitor is initially uncharged. How long after the switch is closed is the voltage across the capacitor three times as large as the voltap7 p l8 go:6npvwoqt.ae,r6.fawf t,7 ge across the resistor?

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