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Understanding
current (NL)
and voltage
(NL) in a series
circuit.
Add a second
circuit to the plastic canvas that you used for the one-bulb activity.
Because this circuit has two bulbs, what factors do you think would be different
from the single bulb circuit?
In what way would these
factors be different?
Strip (NL)
insulation off the ends of the wires.
Weave
the wires of the two light bulbs into the canvas, one next to the other, as
shown below.
Connect (NL)
the wires between the bulbs to each other.
Connect
the two free wires to the battery, as shown in the circuit below. This is
called a series circuit.
Describe
the brightness of the bulbs as compared to that in the single-bulb circuit.
Measure
the voltage across each bulb: Bulb 1:
V Bulb 2:
V
How are the brightness and the bulb voltage related to each
other in the one-bulb circuit and in the two-bulb series circuit?
How are the battery voltage and the bulb voltage related to
each other in the one-bulb circuit and in the two-bulb series circuit?
Here is the circuit
diagram (NL)
for the circuit above. Using a colored pencil, trace
the path of the current (NL) in the circuit, starting
from the negative (minus) of the battery. Draw arrows to show the path of
the current.
What do you think will happen if you removed one-bulb from this circuit?
Try it. What happened?
(NL)
(NL)