Answer Happy

To calculate voltages in a battery charging circuit and to
calculate the capacitance needed in rectifier circuits.
A rectifier circuit is one that converts ac power to dc power.
The most basic rectifier circuit consists of only a diode and a
resistor in series. The diode is on for positive voltage only, so a
sinusoidal input voltage is converted to an output voltage similar
to that shown in (Figure 1). Such an output voltage can be used to
charge a battery, or can be smoothed with a capacitor to supply a
dc voltage.
Part B
The specifications for an appliance require a dc power supply
that delivers 20 mAmA and 20 VV with a tolerance of 0.4 VV . The
circuit used in the power supply is shown in (Figure 3). If the ac
source operates at 60 Hz, approximate the value of the smoothing
capacitor that will meet these specifications.
Express your answer to three significant digits with the
appropriate units.
Part C
Repeat the previous part for the power supply shown in (Figure
4). Approximate the value of the smoothing capacitor.
Express your answer to three significant digits with the
appropriate units.