18 V 12 N 2 v's Figure P1.71

You have been asked to investigate the loading effects on an alternator supplying a load and also charging a car battery at the same time. The output of the alternator has been rectified to smooth dc, and the circuit is shown below.   Using Kirchhoff analysis, determine the initial current in each section along with its direction and the potential difference across the load.

While constructing a Bridge rectifier, the designer mistakenly has swapped the terminals of D3 as shown in the figure below, where • Diode D3 is damaged so that it is always open circuit regardless of the applied voltage. • vs(t) is a sinusoidal signal with a peak value (Vs = 5 V). • Diodes are modelled using the constant voltage model with VDO = 0.7 V • The ac line voltage has an rms value of 120 V and a frequency (f) = 60 Hz • The resistance RL = 10 kohm. a) Calculate the transformer turns ratio (N1/N2) if vs(t) is obtained from the secondary side of the transformer whose primary side is connected to the ac line voltage (which has a 120 V rms value). b) Plot in the same graph the input signal vs(t) and the output signal vout(t) (show all details including amplitudes, time instances, etc.) c) Calculate the rms values of the output signal vout(t). (hint: sin2 (x) = 0.5(1- cos(2x))) d) If a capacitor C = 3.58 µF is connected across R = 10 kohm, repeat (b) in a new graph e) With the…

After solving a circuit with ideal diodes (Vf=0), what check is necessary for diodes initially assumed to be on? Off? We must check to see that reverse voltage appears across all diodes assumed to be on, and we must check to see that forward current flows in diodes assumed to be off We must check to see that forward current flows in diodes assumed to be on, and we must check to see that reverse voltage appears across all diodes assumed to be off

3. In the following circuits, given source voltage Vs=9V, R1, R2 and R3 all are 1kOhms. Answer the questions by considering the diodes as ideal and practical silicon ones respectively. Vs Vs Vs R2 R2 R2 Vout P D R1 R1 R3 R1 (a) Vout = ? (b) Vp = ? (c) Vp = ? Note: Vp means the voltage at point p. w