1. Explain how does one ensures that logic gates X and Y are compatible.  2. Predict and explain the state of LEDs W, Z, and the buzzer during a) Current sourcing b) Current sinking

HOW and/or then) 1. a) The circuit below has three resistors with values R₁-10 S2, R2-20 2, R3-30 S2, one initially (t=0) uncharged 0.001 F capacitor, and a 30 V battery. Find all the currents at t=0 (right after the switch is closed,) all the currents a long time after the switch is closed (at steady state), and the charge on the capacitor at t→∞0. At time t₁, once steady state with the switch close has been effectively reached, the switch is reopened. Find the currents at this time, right after reopening the switch. Make sure to make your reasoning clear! T=t₁ 4+ ww R₁ b JE S R₂ www www. R3 30 0.001 D₁ I₂ Iz 1+²0 12 O +=2

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3. Write down the equation for V for this RC circuit and describe the relationship between the variables. For example, if C remains constant and R is larger, the potential difference changes (faster/slower/stays the same).  4. Write another sentence for V vs. C if R remains constant and C is increased.