Charging and Discharging of capacitor

1#

09.36: For the RC circuit shown, the resistance is R = 0ihqq;/z0,qw;xqce j1 .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 across the capaciteq / 1h,;;jxqw c0iqzqor 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 will take the least time to charge tbt2 u6xt72 :(lesnh6( il gb.dq j1ehwhe 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 c2t6db6w:x( j.qgh nib u2lees 7( 1hltapacitors 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 hq *4e 0qy hi,m*ttakt(9 ge/ysas been left 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 switch S once it is c isa(tq qghyt, *09*e4te /ykmlosed?

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 zvi(nm28 m:gfw)*4 )d pl 5dhof8bzglshown is closed at time t=0. All circuit elements are ideal and R=10.0Ω, C=2.20 F and gm d:vf4onm*( 8zwgd h2il z5plb)f8 )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 across the resistor?

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