PASCO EM-8622 BASIC ELECTRICITY - Manual (Page 10)

6
Basic Electricity 012-04367E
Procedure
➀
Use two pieces of wire to make connections between the springs on one of the light bulbs to
the springs on the D-cell in such a way that the light will glow. Discuss with your lab partner
before you begin actually wiring your circuit which connections you intend to make, and why
you think you will be successful in activating the light. If you are not successful, try in order:
changing the wiring, using another light, using another cell, asking the instructor for assis-
tance.
a) Sketch the connections that the wires make when you are successful, using the symbols
from the first page of this lab.
b) Re-sketch the total circuit that you have constructed, making the wires run horizontally
and vertically on the page. This is more standard in terms of drawing electrical circuits.
➁ Reverse the two wires at the light. Does this have any effect on the operation? Reverse the
two wires at the cell. Does this have any effect on the operation?
➂ In the following steps, use a vacant spring
connection such as one of the three around the
transistor socket as shown on the right as a
“switch.” Connect one lead from the battery to
this spring and then take a third wire from the
spring to the light. You can now switch the
power “on” and “off” by connecting or not
connecting the third wire.
➃
Use additional wires as needed to connect a second light into the circuit in such a way that it is
also lighted. (Use a “switch” to turn the power on and off once the complete wiring has been
achieved.) Discuss your plans with your lab partner before you begin. Once you have
achieved success, sketch the connections that you made in the form of a circuit diagram.
Annotate your circuit diagram by making appropriate notes to the side indicating what
happened with that particular circuit. If you experience lack of success, keep trying.
➤ NOTE: Is your original light the same brightness, or was it brighter or dimmer that it was
during step 1? Can you explain any differences in the brightness, or the fact that it is the
same? If not, don’t be too surprised, as this will be the subject of future study.
➄
If you can devise another
way of connecting two lights
into the same circuit, try it
out. Sketch the circuit
diagram when finished and
note the relative brightness.
Compare your brightness
with what you achieved with
a single light by itself.
➅
Disconnect the wires.
Return the components and
wires to the plastic case on
the Circuits Experiment
Board. Return the equip-
ment to the location indi-
cated by your instructor. Circuits Experiment Board Model 555-04182-1
2 amp slow blow fuse
ABC
1.5 volts D cell
1.5 volts D cell
Model EM-8622
CIRCUIT EXPERIMENT
BOARD
KIT NO.
Battery Holder
Potentiometer
Springs
Figure 1.2
Light Bulbs Resistor (3.3
Ω
)
Storage
Box
➤ ➤
Can be
removed
“Switch”
Figure 1.1
Transistor
Socket