1. 7. Direct Current circuits

11. 11 Find the currents, which flow in all the wires of the circuit in this figure 12  9 V 6 V b a cd 18  I3 I3 I1 I1 I2I2 I 1 = -1.75 A, I 2 = 0.5 A, I 3 = -1.25 A

17. 17 Consider a capacitor of capacitance C that is being discharged through a resistor of resistance R as shown in this Figure. C = 40 μ F, R = 8000 Ω, and Q 0 = 50 μ C: initial charges on the capacitor. 1.Determine the initial value of the capacitor voltage, initial value of the current, and current at t = 10 ms. 2.Determine the charge of the capacitor at t = 10 ms Δ V 0 = 1.25 V, I 0 = 156.25 μ A, I (10ms)= 151 μ A Q 0 = 48.5 μ C