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

1#

09.36: For the RC circuit shown, p(is.3 mt)1 tsysg yo8the 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 )1tyipsg 3.stm(yos 8voltage 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 bed* ty wcx96/c uupg75flow, 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 i6c9 /*d5 u cugxwt7pyfdentical 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 harw u r+oy /v+hl:c)ua5y 6amnuoo6t. 0s been left open for a very longtime. All circuits elements are consiw ut+ rlo65uvy a/.6o):n muhyc+ro a0dered to be ideal. Which one of the following 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 closed at time t=0. All circuj6-uun l1lngj *h70h 9gvwp 5zit elements are ideal and R=10.0Ω, C=2.20 F and ξ = 12.0 V. The c9n0j6llw1j uh-zhg 5* g nup7vapacitor 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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