Lab6
leobarc,a
Lab6_phy2_report.docxTA: Keslo Estil SEC#: Name:
Lab 6. Series and Parallel Circuits
Components such as resistors and capacitors in an electrical circuit are in series when they are connected one after the other, so that the same current flows through all of them. Components are in parallel when they are all connected between the same pair of points. Series and parallel combinations function differently. You may have noticed the differences in electrical circuits you use. When using some decorative holiday light circuits, if one lamp burns out, the whole string of lamps goes off. These lamps are in series. When a light bulb burns out in your house, the other lights stay on. Household lamps and other electrical devices are normally in parallel.
You can monitor these circuits using a Current and Voltage Probe System and see how they operate. One goal of this experiment is to study circuits made up of two resistors in series or parallel. You can then use Ohm’s law to determine the equivalent resistance of the two resistors.
OBJECTIVES
• To study current flow in series and parallel circuits. • To study voltages in series and parallel circuits. • Use Ohm’s law to calculate equivalent resistance of series and parallel circuits.
» Two resistors (about 56 and 82 ). «
Preliminary Questions (1-3)
Analysis (1-10)
Note: Show all equations, calculations to receive full credit.
Data Tables
|
Part I: Series Circuits |
|||||||
|
|
(Ω) |
(Ω) |
I (A) |
(V) |
(V) |
(Ω) |
(V) |
|
1 |
56 |
56 |
|
|
|
|
|
|
2 |
56 |
82 |
|
|
|
|
|
|
3 |
82 |
82 |
|
|
|
|
|
|
Part II: Parallel Circuits |
|||||||
|
|
(Ω) |
(Ω) |
I (A) |
(V) |
(V) |
(Ω) |
(V) |
|
1 |
56 |
56 |
|
|
|
|
|
|
2 |
56 |
82 |
|
|
|
|
|
|
3 |
82 |
82 |
|
|
|
|
|
|
Part III: Currents |
||||
|
|
(Ω) |
(Ω) |
(A) |
(A) |
|
1 |
56 |
56 |
|
|
|
2 |
56 |
82 |
|
|
34
Lab 6. Series and Parallel Circuits Components such as resistors and capacitors in an electrical circuit are in series when they are connected one after the other, so that the same current flows through all of them. Components are in parallel when they are all connected between the same pair of points. Series and parallel combinations function differently. You may have noticed the differences in electrical circuits you use. When using some decorative holiday light circuits, if one lamp burns out, the whole string of lamps goes off. These lamps are in series. When a light bulb burns out in your house, the other lights stay on. Household lamps and other electrical devices are normally in parallel.
You can monitor these circuits using a Current and Voltage Probe System and see how they operate. One goal of this experiment is to study circuits made up of two resistors in series or a a e . Y ca he e Oh a de e i e he e i a e e i a ce f he e i .
OBJECTIVES To study current flow in series and parallel circuits. To study voltages in series and parallel circuits. U e Oh a ca c a e e i a e e i a ce f e ie a d a a e ci c i .
Series Resistors
Parallel Resistors
MATERIALS computer two 56- resistors Labquest Mini two 82- resistors low-voltage DC power supply momentary-contact switch current probe & voltage probe connecting wires
PRELIMINARY QUESTIONS 1. Based on what you know about electricity, hypothesize about how series resistors would
affect current flow. What would you expect the effective resistance of two equal resistors in series to be, compared to the resistance of a single resistor?
