Download Lab 4 Result Sheet

ELECTRONIC DEVICES AND CIRCUITS
LAB #4
BRIDGE RECTIFIER AND CAPACITIVE FILTERING
Lab Result Sheet
Name __________________
Sketch the Vout waveform with a 10 µf capacitor across RL showing the maximum,
minimum and zero voltage levels.
Vout, max = _______
Vout
Vout, min = __________
0V
VRIPPLE, PP = _______
Vout, meas = __________
Vout, avg = 0.5( Vout, max + Vout, min ) = ________
Ripple freq
Measure Vout with DVM with 10 µf capacitor
fR =
___________
Vout = ________
Sketch the waveform showing the peak to peak ripple voltage with C = 100 µF and
with the scope to AC input.
VRIPPLE, PP = _______
RIPPLE VOLTAGE
QUESTIONS:
1. A transformer is rated at 120Vrms primary/46V rms secondary. What peak to
peak secondary voltage would be displayed on a scope?
VSec,pp = _______________
2. A scope measures a secondary voltage as 42.4 Vpp, what would an AC
voltmeter (DVM) read ?
DVM reading _____________l
3. The % ripple is calculated as
Vpp ripple
X 100%
VDC
Determine the % ripple for both capacitors used in the experiment.
% Ripple (10 uF) = ____________ % Ripple (100 uF) = ____________
Signed ………………………………
Date……………………….