PASCO EM-8656 AC_DC ELECTRONICS LABORATORY - Manual (Page 12)

8
AC/DC Electronics Laboratory 012-05892A
®
PART B
➆ Connect a single D-cell to a single light as in step 1, using a spring clip “switch” to allow
you to easily turn the current on and off. Note the brightness of the light.
⑧
Now connect the second D-cell into the circuit as shown in Figure 2.1a. What is the effect
on the brightness of the light?
⑨
Connect the second D-cell as in Figure 2.1b. What is the effect on the brightness?
➉
Finally, connect the second D-cell as in figure 2.1c. What is the effect on the brightness?
➤ NOTE: Determine the nature of the connections between the D-cells you made in steps
8-10. Which of these was most useful in making the light brighter? Which was least
useful? Can you determine a reason why each behaved as it did?
PART C
11 Connect the circuit shown in Figure 2.2. What is the effect of rotating the knob on the
device that is identified as a “Potentiometer?”
Discussion
➀ Answer the questions which appear during the experiment procedure. Pay particular
attention to the “NOTED:” questions.
➁
What are the apparent rules for the operation of lights in series? In parallel?
➂
What are the apparent rules for the operation of batteries in series? In parallel?
➃
What is one function of a potentiometer in a circuit?
Figure 2.2
C
W
A B C
C
B
E
–
+
Battery
Figure 2.1c Figure 2.1a Figure 2.1b