For the circuit below, you are given that (W/L)n = (W/L)p = 2 and VDD = 3 V. At t = 0 seconds, the voltage Vin instantaneously switches from 0 V to 3 V, which turns transistor M1 on. This will cause the voltage VQ across the capacitor to decay. (note: prior to t = 0 seconds, the circuit is in a static condition so VQ = VDD). Use the following parameters: kn′ = 1 mA/V2, kp′ = 0.5 mA/V2, |Vt| = 1 V for both PMOS and NMOS. What is the current through the capacitor at t = 0? 4 mA 2 mA 10 mA 30 mA In the circuit above, what is the current through the capacitor when VQ = 1.5 V? 1.875 mA 0.9375 mA 3.75 mA 7.5 mA
For the circuit shown below, ε = 20 V, L = 4.0 mH, and R = 5.0 Ω. After steady state is reached with S1 closed and S2 open, S2 is closed and immediately thereafter (at t = 0) S1 is opened. Determine (a) the current through L at t = 0, (b) the current through L at t = 4.0×10−4 s, and (c) the voltages across L and R1 at t = 4.0×10−4 s. R1 = R2 = R.
Q2: For circuit shown beside consider two uncharged capacitors c1 = 14 μF, c2 = 6 μF and ε = 24 V. If initially the switch s1 is closed and s2 is opened for long time and then the switch s1 is opened and s2 is closed for long time, find: a. What the charge ( in μC) on the capacitor c1 when the switch s1 is closed and s2 is opened? b. Calculate the potential difference (in V) across capacitor c2 when the switch s1 is opened and s2 is closed?
In the following figure, you can see a circuit with R1 = 2 Ω, R2 = 2 R1, R3 = 0.5 R2, R4 = 2 R3. E1 and E2 are identical batteries with EMF 5 V and internal resistance 0.25 Ω. (a) Find the current in every resistance using Kirchhoff's law. [6] (b) Find the potential difference, VAC, between A and C point. [2] (c) Suppose, you replace the second battery with a capacitor of capacitance of 10 F. After sufficient time, what would be the total current of the whole circuit? [2]