PASCO EM-8656 AC_DC ELECTRONICS LABORATORY - Manual (Page 88)

84
AC/DC Electronics Laboratory 012-05892A
®
Questions
➀ In Unit Three, how do the plots of voltage across the diode and voltage across the resistor com-
pare to a complete sine wave?
➁ Based on your previous investigate of diodes, why do the plots of voltage across the diode and
voltage across the resistor from the first part of Unit Three have the shape and size they do?
➂ In Unit Three, how did the plots of voltage across the diode and voltage across the resistor change
when the diode was replaced with the LED? Explain.
➃ In the first part of Unit Four, what happens to the trace of voltage across the diode when the
470
µ
F capacitor is put in parallel with the 100
Ω
resistor? Why is the capacitor considered to be a
“filter”?
➄
In the first part of Unit Four, what happens to the trace of voltage across the diode when the 10
Ω
resistor is added in parallel to the 470
µ
F capacitor and 100
Ω
resistor?
➅
In the second part of Unit Four, how does the trace of voltage across the 100
Ω
resistor in the four
diode bridge compare to the trace of voltage across the single diode in the second part of Unit
Three?
➆ What happens to the trace of voltage across the four diode bridge when the 470
µ
F capacitor is
put in parallel with the 100
Ω
resistor? How does the shape of this trace compare to the similar
“filtered” trace in the third part of Unit Three?
➇
What happens to the trace of voltage across the four diode bridge when the 10
Ω
resistor is added
in parallel? How does the shape of this trace compared to the similar “load resistor voltage” trace
in the third part of Unit Three?
➈ Compare the performance of the single diode circuit to the four diode bridge as far as providing a
steady, constant direct current when a low resistance load is connected.