Charging and Discharging of capacitor

1#

09.36: For the RC circuit shown, the resistance is R = 0.10 R, the capacitx.oexsm*em ;r.tfa 00c ,vwx:ance is C =5.0 F and the battery has 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. Whatwt xo;. r mf.v*,ascexx0:0em is the magnitude of the voltage across the capacitor at that moment?

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2#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

09.41: For the circuits shown below, which wi/y2vg0lrkc-pilz4 ; all take the least time to charge the ca/yrp 24i-lzc 0;lgakv pacitor(s) to 90% of the full charge? All batteries are ideal and identical with EMF ξ , all resistors are identical with resistance R , and all capacitors are identical with capacitance C and are initially uncharged.

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3#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

14.38: In the circuit shown,the switch S has been left*qan. w(hl vf0 open for a very longtime. All circuits elements are considered to be ideal. Which one of the following statements best describes the behavior of the current through the*av(lh0w .nq f 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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4#

单选题 ( 1.0 分) 切至整卷模式搜藏此题

13.45: The switch S in the RC cirwie3xhplos i9pj+ 7xd512yamf/6)hr cuit shown is closed at time t=0. All 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 thdh ow/p m+h2x i19if7lrye3 pxs)5a 6je voltage across the resistor?

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