Name ________________________ # ______ Date _______________
Name ________________________ # ______ Section # __________
Name ________________________ # ______
Check off each procedure upon completion
Part A – Drawing a parallel
circuit (Use a pencil)
1. ____Draw a voltmeter into the circuit drawn above where it would be
able to measure the voltage of the second resistor. (2 pts)
2. ____Now draw an ammeter into the circuit drawn above where it would be
able to measure the current of the third resistor. (2 pts)
3. ____Construct a parallel circuit with the following resistors - 10 ohms, 30 ohms and 30 ohms. (IN THAT ORDER) Connect the source to the 10-ohm resistor.
Important tips -
·
Spread out your wires - use one full table of
space
· Connect your meters LAST!
V1 (Volts) |
V2
(Volts) |
V3
(Volts) |
|
|
|
5. ____Use one of your parallel circuit equations to find VT (Total Voltage)
Equation (2 pts) Answer (3 pts)
6. ____ Measure the following currents using your ammeter (3 pts each)
IT (Amperes) |
I2 (Amperes) |
I3 (Amperes) |
|
|
|
7. ____Use a parallel circuit equation from your reference table to find I1 .
Show all work for full credit.
Equation
(2 pts)
Answer
(3 pts)
8. ____Use the information from the other tables to fill in the first two columns of
this chart.
9. ____Calculate the values of each
resistors using Ohm's Law (Column 3)
(4
pts each)
V1
(Volts) |
I1
(Amperes) |
Calculated Value of Resistor from Ohm's
Law |
Printed
Value
of Resistor |
|
|
ohms |
10 ohms |
V2
(Volts) |
I2
(Amperes) |
Calculated Value of Resistor from Ohm's
Law |
PrintedValue of Resistor |
|
|
ohms |
______ ohms |
V3 (Volts) |
I3 (Amperes) |
Calculated Value of Resistor from Ohm's
Law |
Printed
Value
of Resistor |
|
|
ohms
|
______ ohms |
10._____ Name a part of your
circuit that had resistance that was never discussed
in
this
lab?
(4
pts)
11. ___ Find the total resistance
of this circuit using two different equations. Show all
work for full
credit. (Note: Use the printed values of the resistors)
Equation 1
(5
pts)
Equation 2
(5
pts)
Summary Questions
2. If you attached the three resistors you were given today in a series
circuit, would
your new circuit
produce more or less total current? Support your answer with a
drawing and
calculations.
(4
pts)
3. If you had a stronger voltage source how would that effect the size of the total current in your parallel circuit? EXPLAIN (4 pts)
4. Suppose you were given a resistor without markings on it to tell you its value. Describe how you could you use the supplies you were given today to find the value of the unknown resistor. EXPLAIN (4 pts)