Charging and Discharging of capacitor

1#

09.36: For the RC circuit sh2km)b vr nhyx,*m03 f,nqzrf-.jxp9gown, the resistance is R = 0.10 R, the capacitance 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. What is the magnitude of the voltage acmv p-m3, f.jny*x2b n9 k)f,xz0rhqg rross 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 shownni9qj+z/ 6wk e below, which will take the least time to charge the capacitor(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 unchark +9n6weq/ijzged.

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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 open for a very longtnqfp + 9*91y0tmq ujucime. All circuits elements are considered to be ideal. Which one of the followingqjtfy919n0uc q up *m+ 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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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 circuit shown is clos ak3icz) k)/;skq3hpur,l1cked 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 lohsk13azkcklrp))/c, q3;i k ung after the switch is closed is the voltage across the capacitor three times as large as the voltage across the resistor?

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