Question

1. Consider this circuit with resistors and capacitors. The R2 battery V1 has a voltage of 9 V, the resistors R1 and R2 have values of 100 Ω and 50 Ω, and the capacitor C1 has a value of 100 nF. Initially, the switches S1 and S2 are open. S2 (10 points) Once we close S1, what will the voltage across Rl and Cl be? How much current initially flows around the closed loop? (10 points) The current in part a will charge the capacitor. Once the capacitor is charged, how much current flows around the loop? How much charge can the capacitor hold? a. C1 R1 S1 V1+ b. (5 points) Once the capacitor is charged, switch S1 is opened, and S2 is closed, so that the capacitor will discharge through R2. How long does it take half of the charge to flow out of c. e capacitor? This can be referred to as the half-life of the capacitor. (5 points) Calculate the energy stored in the capacitor. You can also try to estimate the energy by multiplying the power supplied by the capacitor to the resistor by RC, the charging time. Is this an over-estimate or an under-estimate? Why? d. 2. (20 points) Consider this circuit with four resistors, R1 whose values are R1-68 Ω, R2-82 Ω, R3-47 Ω, R4-56 Ω, and VI has a voltage of 6 V. Calculate the voltage and current for each resistor. R2 R4

Answer 1

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