Grades 912 Performance Task
Contributed by: New York State Education Department (NYSED)
Developed through University of Buffalo and NORC (1991)
Electric Circuits  Part A
Introduction:
This laboratory test presents a problem and lists
materials available to you. Your task is to design a strategy
for solving the problem. Please record all your answer on these
sheets. You will have 30 minutes to plan and design an experiment
to solve the problem.
Problem:
Imagine that you are working for an electronics firm.
You have been assigned the task of determining the power
dissipated in the combination of two resistors connected
in series to a 6 volt battery.
You will recall that:

a) Under the heading PROCEDURE list in order
the steps of the procedure you will use to solve the problem.
You may include a diagram to help illustrate your plans for the
experiment. Include any safety procedures you would follow.
b) Construct a DATA TABLE or indicate any
other method that you could use to record the observations and
results that will be obtained.
c) At the end of 30 minutes, your answer sheet for
Part A will be collected.
PLEASE NOTE: In Part A, you are NOT to proceed
with any part of the actual experiment. You are just to plan and
organize a way to investigate the problem.
Materials:
 2 resistors of unknown resistance
 10 connecting leads
 6 volt battery
 ammeter
 knife switch
 voltmeter
EXPERIMENT REPORT #5  Part A
Organize our experiment under the following headings:
PROCEDURE and DATA TABLE
Use the front and back of these sheets if necessary.
PROCEDURE
EXPERIMENT REPORT #5  Part A
DATA TABLE (For results and observations)
Electric Circuits  Part B
Introduction:
You will have 50 minutes to complete this part. You
have been provided with a detailed Procedure (see next page) which
you are to follow. Record your work for Part B on the answer sheet
under the appropriate headings.
Problem:
Imagine that you are working for an electronics firm. You
have been assigned the task of determining the power dissipated
in the combination of two resistors connected in series to
a 6 volt battery.
You will recall that:

a) Perform the experiment by following the steps outlined in the
procedure.
b) Under the heading RESULTS/OBSERVATIONS record the data
collected in the experiment. Use statements, descriptive paragraphs,
and tables of data where appropriate.
c) Under the heading CALCULATIONS show all equations and
calculations used.
d) Under the heading CONCLUSION give an interpretation of
your results.
e) At the end of the 50 minutes, your answer sheets will be collected.
Materials:
 2 resistors of unknown resistance
 10 connecting leads
 6 volt battery
 ammeter
 knife switch
 voltmeter
EXPERIMENT REPORT #5  Part B
Complete the Procedure as given on these sheets.
Record your Data in the table provided.
Procedure:

Set up the circuit as shown in the Figure
2 below. Do not close the switch until the evaluator checks
your work sheet.

Measure the current in the circuit by placing
the ammeter in series with the resistors, as shown in Figure
3 below. Do not close the switch until the evaluator checks
your work sheet. Record your measurements (magnitude and
units) in the data table.

Measure the voltage drop across each resistor
in the circuit by placing the voltmeter in parallel with the
resistors, as shown in Figure 3 above. Do not close the
switch until the evaluator checks your work sheet. Record
your measurements (magnitude and units) in the data table.

Determine the total voltage in the series
circuit by adding the voltage drops for each resistor.

Refer to the equations listed in the Problem,
to compute the power used by the circuit. Show your calculations.
Data Table:
Variables

Measurements

current 

voltage across one resistor 

voltage across second resistor 

total voltage in circuit 

EXPERIMENT REPORT #5  Part B
Record your Calculations and Conclusions on these
sheets.
CALCULATIONS
CONCLUSION
Based on the analysis of the data you collected
in this experiment, determine the power dissipated by the two
resistors connected in series. Be certain to explain how you used
your data to arrive at this conclusion.
