Download File - Frances Díaz Sánchez

Circuits
Fernando Velázquez
12 -21
Prof. Frances Díaz
I.
Title – Circuits
A. Circuit, also know as electronic circuit, is composed of
individual electronic components, such
as resistors, transistors, capacitors, inductors and diodes, connected by
conductive wires or traces through which electric current can flow.
II.
III.
IV.
Materials
A. (2) D Batteries
B. Copper Wire
C. (3) #48 light bulbs
D. (3) Bulb holders
Procedures
A. Series Circuit
a. First we made a series circuit, comprised of two light
bulbs and a battery.
b. We connected the battery to a copper wire in the positive
side, which we then connected to one light bulb and
looped it back to the negative side of the battery.
c. We then connected the second light bulb to the circuit by
removing the copper wire and looping it to the second
light bulb and the reattached it to the negative side of the
battery. This caused the first light bulb to dim and then
return exuding the same amount of light as before
attaching the second.
d. Now we tightened bulb X but unscrewed bulb Y, by doing
this both light bulbs turned off immediately.
e. Lastly we added a third light bulb, by attaching another
copper wire to one light bulb and the attaching it to the
negative side of the battery. When doing this the battery
didn’t have enough voltage for three light bulbs so the
three became very dim and did not regain the amount of
light that they were exuding.
B. Parallel Circuit
a. Starting off by creating a parallel circuit, comprised of two
light bulbs and a battery.
b. We first connected a copper wire to the positive side of
the battery, which we then took to the light bulb and
ended the loop by reattaching it to the negative side of the
battery.
c. Now we added a second light bulb, but by attaching
another looped circuit to the existing one on either sides
of the copper wire in perspective to the light bulb. By
doing so the second light bulb lit up immediately.
d. Now we unscrewed bulb X and tightened bulb Y, when we
did this the light bulb that was unscrewed, X, turned off,
but bulb Y remained lit.
e. Now we unscrewed bulb Y and tightened bulb X, the same
result as procedure Bd occurred, in which the unscrewed
bulb turned off, but the one that was tightened remained
lit.
Data
Circuits
a.
b.
c.
d.
e.
Circuits
a.
b.
c.
d.
e.
A. Series Circuit – Yes: bulb would light – No: bulb would not light
Prediction
Test
Yes
No
Yes
No
X
X
X
X
X
X
X
X
X
X
B. Parallel Circuit – Yes: bulb would light – No: bulb would not light
Prediction
Test
Yes
No
Yes
No
X
X
X
X
X
X
X
X
X
X
.
A.
B.
C.
D.
E.
H.
I.
J.
Lab 2.
1. +
_
2. +
+
_
3.
4.
5.
6.
Lab 3.
Lab 4.
5.
V.
Analysis
A. Series Circuit
a. What did you notice happened to the first bulb when the
second bulb was added? The bulb dimmed a little and
then regains the light it was exuding before.
b. Look carefully at how the series circuit is set up. Write a
prediction of what you think will happen if you unscrew
one of the bulbs. Why did you make this prediction? – If I
unscrew one of the bulbs the other will turn off, because
the current doesn’t have a way to loop back to the battery.
VI.
c. Tighten bulb X and unscrew bulb Y. Describe what
happens to bulb X. – Bulb X turns off
d. Add a third bulb to your series circuit. What happens to
the brightness of the bulb is added to the series? The
brightness was lowered, because the voltage of the
battery wasn’t high enough for the three light bulbs.
e. Draw a schematic diagram with 3 bulbs. Number 6
B. Parallel Circuit
a. What do you notice happened to the first bulb when the
second bulb was added? The light bulb remain lit
b. Look at how a parallel circuit is set up. Write a prediction
of what you think will happen if you unscrew one of the
bulbs in the parallel circuit. – The other light bulb will
remain lit even so, because the current travels through a
different path than the other light bulb.
c. Unscrew bulb X. Describe what happened to bulb Y. –
Bulb Y remains lit.
d. Tighten bulb X and unscrew bulb Y. Describe what
happens to bulb X. – Bulb X remains lit.
Conclusion
A. In conclusion we were able to prove the differences in both circuits
(parallel, and series), and also prove the effects of adding a light
bulb and cutting off the currents path. In both cases procedures a.
and b. suffice in lighting up, but in c. and d. of the circuits only the
parallel could light the bulb and in the series it did not. Even so the
energy the two and the three light bulbs in the series circuit were
exuding more light that the parallel circuit, meaning that each
circuit has its benefits and down side.