In the attached image, how is VDC across the load resistor found?

The practice test has an answer of 28.24 ignoring the ripple voltage. VDC across the resister is Vout right? So, Vsecondary - the voltage drop in the diode = Vout = VDC

So, if the secondary winding has 40voltage - .7V drop in the top resistor, that's 39.3V. How is 28.24 derived? Thank you.

Also, when asked for the power dissipated in the transistor, exactly which voltage and current is used in the calculation? Is it Ve and ie?

What is a varacter operated in the reverse saturation region? Is seems like the depletion region width is being controlled by a variable forward bias - why is this wrong?

The Transform factor is 3:1 so the output will be 120/3=40V "rms". If one wants to find the V peak to peak at the left he must multiply with 2 times sqrt[2] - 2 times because his wave goes from -Vp to +Vp (sine wave with negative and positive values).At the right of the T/F you we have Vp-p=2*sqrt[2]*40Vrms - Attention: That is at the coil from top to bottom! If you count from Top to the middle or from Middle to bottom it is 20 Vrms - so be careful

We take as reference the ground, which is the middle of the coil! After the Diodes all of the negatives has become positives we have ...

Solution Summary

This solution provides an explanation for finding Voltage using transform factor and reference to diodes and capacitors.

FIGURE 1(a) shows a power supply using a full-wavebridgerectifier circuit. The main supply is stepped down by the transformer T1 and the secondary voltage Vs rectified by the four diodes D1 -D4; diodes D1 and D3 conduct on one half cycle and D2 and D4 on the other. The diodes are provided in a single 4-pin bridge-rectifier pac

[11.13] A single-phase bridgerectifier has a purely resistive load R=10 Ohms, the peak supply voltage Vm=170 V, and the supply frequency f=60 Hz. Determine the average output voltage of the rectifier if the source inductance is negligible.
Answers:
a) Vd=120.13 V
b) Vd=113.32 V
c) Vd=150.42 V
d) Vd=80.41 V

Please check my work and if incorrect give me the correct answer
Please refer to the problem stated in the attached file.
(For the full-waverectifier circuit shown below, the supply voltage is 18-V rms sinusoidal, Vdo is approximately 0.7V and R=120. What is the value for PIV?)
This is my solution:
Piv=2Vs-Vd
2*18sq

In the complementary output rectifier, If Vs=26*sin 2*pi*60*t Volts, sketch the output waveforms vo+ and vo- versus time, assuming Vgamma=.6V for each diode.
I don't understand the graphic questions. Will there ever be a time when the voltage goes negative? because it looks like a FWR.
Thanks

A permanent-magnet moving-coil milliammeter, having a resistance of 15 Ohm and giving full-scale deflection with 5 mA, is to be used with bridge-connected rectifiers and a series resistor to measure sinusoidal alternating voltages. Assuming the forward resistance of the rectifier units to be negligible and the reverse resistance

Q1. A 9 V power supply delivers 2 A to a resistive load. The a.c. supply is 230 V, 50 Hz and a bridgerectifier is used in conjunction with a 0. 047 farad reservoir capacitor.
Estimate:
(a) The peak-to-peak ripple voltage.
(b) The transformer secondary voltage if the total forward voltage
drop in the rectifier is 2 V at 2 A.

I've attached jpegs that show the circuits that I'm working with. My problem is that I don't know how to find the values of Ct and Rt for a specific firing angle. What formulas are needed? Is the calculation affected by the fact that there are two different loads (see circuits 1 and 2 jpegs)? What process must I go through to fi

Please see attachment for complete question.
Consider the full-wave rectified signal
y(t) = | sin(PI t) | - Infinity < t < Infinity .
(a) As a periodic signal, y(t) does not have finite energy, but it has a finite power Py. Find it.
(b) It is always useful to get a quick estimate of the power of a periodic

A full-wavebridgerectifier circuit with a 1-kohms load operates from a 120-V (rms) 60-Hz household supply through a 10-to-1 step-down transformer having a single secondary winding. It uses four diodes, each of which can be modeled to have a 0.7-V drop for any current. What is the fraction of a cycle that each diode conducts? W