Electricity and Circuits: Capacitor - 无忧得胜-网上国际课程 (5edu.win)

1#

09.36: For the RC circuit 0 : rxup0n7c7-nd:dsi+ dzucq shown, 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 current7n u:udpi00cscd- r7+:zdx nq in the circuit is 0.50 A. What 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, wh4hs jrefy;y/wkg5* s1ich 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 capacityr k ;j* efhg45s1syw/ance 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 3 r(25)rdlk juivqs v5fz 0r9oleft 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 sor09(ur5irlvfsz 2d3q v j)k5 witch 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 sho kd6huf j:+gwmcxq :z a5kvy5 vc8j979wn 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 jakxmw:5ufvkd: yc7c5j99 q h+ vgz68is closed is the voltage across the capacitor three times as large as the voltage across the resistor?

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