ECET-329
Laboratory Experiment No. 1
Page 7 of 21
2.4) PreLab: Open the circuit
between points A1 and A2 of
Figure 2 and again calculate the
values of $I_T$, $I_2$, $I_3$, $V_{R2}$, $V_{R4}$,
and $R_T$. Put them in the
\"Calculated\" column of Table 2b,
below:
[1]
Table
2b
Calculated
Measured
%
Difference
$I_T$
$I_2$
$I_3$
$V_{R2}$
$V_{R4}$
$R_T$
2.5) In the Lab: Open the circuit between points A1 and A2 of Figure 2. Measure the
values of total current $I_T$, $I_2$, $I_3$, $V_{R2}$, $V_{R4}$, and $R_T$. Record them in Table 2b, above.
Measure $I_3$ by opening the circuit between R4 and ground and inserting the VOM in series.
2.6) PostLab: Calculate the % Difference between the Calculated and Measured values of
Table 2b and explain likely reasons for any significant differences here:
[1]
2.7) PostLab: One might think that removing resistance from a circuit would result in an
increase of current flow. Compare the measured value of total circuit current, $I_T$, in Table 2b to
that of Table 2a. When resistance was removed from the circuit (Table 2b), did the total circuit
current, $I_T$, increase or decrease. How do you explain this?
