a. For the circuit shown in Figure 1, the switch is at position #1 for an extended period. Given that the switch is moved to position #2 at time t = 0, calculate the current flowing through the 4 ks2 resistor for t> 0 20 VV, 1=0 8kQ ww R₁ C 200 µF R₂ Figure #1 ww 4 ΚΩ

In the circuit below, switch S is initially disconnected from points A and B. The switch is then connected to A. What is the current and voltage in the resistors and inductor: a) as soon as the switch is turned on b) long after the key is turned on. The switch is then suddenly disconnected from A and connected to B: c) What is the current in the resistors at that moment? d) What is the voltage in the inductor? e) After that moment, what is the total energy dissipated by the resistors?

what is di(1+)/dt in amperes/sec

Find the total inductance at the terminals a-b, for the circuit shown in FigureQ2(b). 25 µH 18 μΗ " a 60 μΗ 20 µH 30 μΗ 75 μΗ 12 μΗ 15 μΗ 38 μΗ Figure Q2 (b)

= Using Kirchhoff's rules, find the following. (₁ = 70.9 V, 8₂= 60.7 V, and 83 1 E₁ R₂ E₂ 4.00 ΚΩ www R₂ 3.00 ΚΩ d E₁ 2.00 ΚΩ www R₁ (a) the current in each resistor shown in the figure above (b) the potential difference between points c and f 79.1 V.)

A Series circuit of 0.1 Henry and 1 ohm resistance is energized by closing a switch to a voltage source and the steady state current is 1 Ampere. How fast is the current changes as the switch closes or at time = 0 ?

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The resistance R and a 2 μF capacitor are connected in series across 200-V dc supply. Across the capacitor is a neon lamp that strikes at 120 volts. Calculate the value of R to make the lamp strikes 5 seconds after the switch has been closed.

In the figure: R1 = 27.3 Q, R2 = 93.1 Q and R3 = 1571.12 Q, then determine the value of the source current Is. 12 13 RT R1 R2 R3 E 1.33 0.98 1.44 1.73 1.15

A voltage-multiplier has a Vm = 60 V peak sinusoidal secondary voltage. During the positive half-cycle, D1 conducts and D2 is cut-off, charging C1 up to what voltage level? C1 HE (A) OV B) 60 V V Ⓒ120 V (D) 180 V Vp 1:1 Vm = 60 V D1 D2 не C2 Ideal diodes C3 HE D3 D4 C4 :