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- At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 mF, ɛ = 30 V, and R = 7.7 kN, what is the potential difference across the capacitor when / = 2.0 mA? R O a. 22.30 V O b. 6.90 V O c. 18.45 V O d. 10.75 V O e. 14.60 V6. A 10.0 μF capacitor is charged to 120 V and is then connected across a 520 resistor only. What is the voltage across the resistor after 6.80 ms?At t = 0 the switch S is closed with the capacitor uncharged. If C = 30 mF, ɛ = 30 V, and R = 4.8 kO, what is the potential difference across the capacitor when / = 2.0 mA? ++Q -|-C R O a. 15.60 V O b. 18.00 V C. 22.80 V O d. 20.40 V O e. 25.20 V
- 6. Four capacitors C₁ = 20 µF, C₂ = 65 µF, C3 = 10 µF, and C4 = 60 µF are connected in series with a 6-Volt battery. Find the voltage drop across the 60-µF capacitor. A. 0.12 V B. 0.55 V C. 2.39 V D. 4.65 V E. 7.08 VA battery has ɛ= 30 V, and an internal resistance of 2.6 N. What is the terminal voltage when it is connected to R= 10 O? O a. 11.90 V O b. 7.94 V O c. 15.87 V O d. 30.00 V O e. 23.81 V1. Sufficient time has elapsed for the capacitors in this circuit to be considered completely charged. a. Find the equivalent capacitance of the circuit. b. Find the charge on the 1.00 μF capacitor. c. Find the voltage across the 4.00 μF capacitor. d. Find the energy stored in the 5.00μF capacitor. 1.00 μF 2.00 μF 3.00 μF 5.00 μF 4.00 μF 6.00 V
- C2 = 10uF C, = 22uF 12V FIGURE 2 Refer to the figure 2. Two electrolytic capacitors are connected in series across a 12-volt supply. What is the total charge of the given circuit? A. 82.5 x10-6C B. 65.2 x10-6 c C. 73.2 x10-6 c D. 120 x10-6 C Select one: O a. A O b. B О с. С O d. DA battery has ɛ= 30 V, and an internal resistance of 1.5 N. What is the terminal voltage when it is connected to R= 10 0? O a. 13.04 V O b. 26.09 V O . 8.70 V O d. 30.00 V O e. 17.39 VA battery has ɛ= 30 V, and an internal resistance of 2.6 Q. What is the terminal voltage when it is connected to R= 10 Q? а. 7.94 V b. 15.87 V c. 11.90 V d. 23.81 V е. 30.00 V
- C, - 10µF C, = 10µF Oane 12V FIGURE 1 Refer to the figure 1. Two electrolytic capacitors are connected in parallel across a 12-volt supply. What is the total charge of the given circuit? A. 240 μC B. 0.6 μC С. 60 иС D. 720 µC Select one: О а. А O b. B О с. С O d. Db. The voltage across the plates of a capacitor at any time t seconds is given by t V(t) = Ve¯RC where V, C and R are constants. Given V = 200 volts, C = 0.1 x 10-6 Farads and R = 4 x 105 ohms. Find i. The initial rate of change of voltage ii. The rate of change of voltage after 0.5 s.Direction: Read each item carefully and choose the letter of the correct answer. 1. What is the use of a capacitor? a. store electrical energy c. vary the resistance d. dissipate energy b. store magnetic energy 2. What do you call the ability of the capacitor to store charge? a. resistance b. friction c. Coulomb's force d. capacitance 3. A circuit contains two capacitors in series, with capacitances of 8F and 20F. What is the equivalent capacitance of this circuit? a. 28.0F b. 14.0F c. 8.3F d. 5.7F 4. Which of the following is true for capacitors connected together in parallel? a. All capacitors in parallel store the same amount of charge. b. All capacitors in parallel must have the same capacitance, ny c. All capacitors in parallel have the same voltage across their plates. d. All capacitors in parallel have the same current through them. 5. What is the equivalent capacitance if 4µF and 2μF capacitors are connected in series? a. 0.75µF b. 1.33μF c. 2.00μF d. 6.00μF 6. What is the…