Charging and Discharging of capacitor

1#

09.36: For the RC circuit shown, the resistance is R = 0.10 b/vejk7h 36mgmx vqc86a*u6jR, 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 across the capacitor at that momenaj/ mv6uxgv 7c36*6jmhekb q8t?

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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 wilgbl48 l2 w4 gj9f0 lqc+kxm(rul 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 uncharged. (uwkcmr+ggl0l 2jlx 4bqf948

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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 sjzoe h/6p z/i 1xim6d0opy/+jhown,the switch S has been left open for a very longtime. All circuits elements are considered to be ideal. Which one of the following statements best describes the behav/pezy j 0+j1mihzoo x6pi6/ d/ior 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 closed at time t=0. All c lnp pbiiu;j 5y;45hr7ircuit 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 voltage ac;5pn5y;u h 4brl7pjiiross the resistor?

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