Charging and Discharging of capacitor

?作业考试练习?美国物理杯赛(Physics Bowl)?Charging and Discharging of capacitor

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习题练习：Charging and Discharging of capacitor

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答题人: 匿名未登录开始时间: 24年08月22日 11:06 切换到: 整卷模式

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09.36: For the RC circuit shown,5)xl ehteyy eq8;c7 :b 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 b 5yce eqhetyxl)78;: across the capacitor at that moment?

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09.41: For the circu;mkg *y+t1tc,fth 9 usits shown below, which will take the least time to charge the capacitor(s)s; t+1 kum,yhftt* c9g 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.

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14.38: In the circuit j2k3 mo3ks uc8kl/ or)shown,the switch S has been left open for a very longtime. All circuits elements are consic/r l soo3 j3ukk)k2m8dered 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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13.45: The switch S in the RC cir32 a,h3d oyvoxcuit shown 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 is closed is the voltage across the capacitor three times as large as the voltage acrosso a3ohx2d,v y3 the resistor?

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