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Complete rc circuit lab report, Study Guides, Projects, Research of Physics

American Academy of Art Physics

Great and complete example of a rc circuit lab report

Typology: Study Guides, Projects, Research

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Sample Lab Report - PHYS 231

The following is an example of a well-written report that might be submitted by a PHYS 231

student.

• The report begins with a short statement of what is being measured, and why.

•The procedure and results are then briefly described for each major part of the exercise. Do not

reproduce the lab manual, but do specify any parameters you chose and any differences from the

suggested procedures.

•Single numbers may be put into the text, but if several values are needed they should be in a

table and perhaps a graph.

•Tables and graphs need to be well labeled, with quantity and units, and should be mentioned in

the text.

•The report ends with a summary or conclusion, if appropriate. The summary must be consistent

with the preceding data and analysis.

•You may prepare any or all portions of your reports by hand, as convenient, but be sure the text

is legible and figures are clear.

•Graphs should be done on graph paper or by computer, not as rough sketches.

Partial preview of the text

Download Complete rc circuit lab report and more Study Guides, Projects, Research Physics in PDF only on Docsity!

Sample Lab Report - PHYS 231

The following is an example of a well-written report that might be submitted by a PHYS 231

student.

• The report begins with a short statement of what is being measured, and why.

•The procedure and results are then briefly described for each major part of the exercise. Do not

reproduce the lab manual, but do specify any parameters you chose and any differences from the

suggested procedures.

•Single numbers may be put into the text, but if several values are needed they should be in a

table and perhaps a graph.

•Tables and graphs need to be well labeled, with quantity and units, and should be mentioned in

the text.

•The report ends with a summary or conclusion, if appropriate. The summary must be consistent

with the preceding data and analysis.

•You may prepare any or all portions of your reports by hand, as convenient, but be sure the text

is legible and figures are clear.

•Graphs should be done on graph paper or by computer, not as rough sketches.

PHYS 231 Experiment 3.14159 RC circuits

by A. Student

with O. K. Partner

Submitted February 30, 2753

Introduction

We studied the voltage across a capacitor as it charged or discharged through a known

resistor. The goal is to show that the charge/discharge follows an exponential function and that

the time constant is R’C, where R’ is the effective resistance of the voltmeter and resistor in

parallel.

Procedure and Results for charge/discharge curves

The circuits for charging and discharging the capacitor were set up as specified in the lab

manual. A stopwatch was started when the switch was thrown to start the charge/discharge, and

the DMM read at known times until the voltage essentially stopped changing.

Results for charging and discharging, with marked values R = 1 MΩ and C = 100 μF, are

shown in the attached graphs. The solid lines are fits to

V(1-exp(-Tx))+K charging

Vexp(-Tx)+K discharging

which were derived in the lab manual. These lines fit the data well, confirming that the charge

and discharge are exponential.

Procedure and Results for time constant

Only the discharging circuit was used for this part. The capacitor was charged to 10.0 V

and the time to discharge to 1/e of that value, 3.68 V, was measured with the stopwatch. The

discharge was repeated two or three times and averaged to reduce error. This was done for both

capacitors and again when connected in parallel. Resistor values were measured with the DMM

instead of using the marked values.

Data for the single capacitors is tabulated below

R

(ohm)

τ 100 μF

(sec)

τ ave 100 μF

(sec)

τ, 220 μF

(sec)

τ ave220 μF

(sec)

55.1K too short 13.72, 13.87, 13.56 13.

106.7K 11.58, 11.20, 11.86 11.55 25.95, 26.07, 25.256 25.

211.1K 21.47, 22.25, 22.50 22.07 50.47, 50.30 50.

.494M 50.12, 50.35 50.24 113.54, 113.65 113.

1.062M 100.87, 101.23 101.05 too long

t (sec)

Automatic Curve Fit on Data Set 1:

 - Graph - 0.00 50.0

1. V (volts)
- - V= 9.89 T= 0.00985 K= 0. f ( x ) = Vexp(-Tx) +K
- Mean Square Error: 0. - Data Set - Graph - 0.00 50.0 t (sec)
- 1. V (volts)
- - V= 8.85 T= 0.00990 K= 0. f ( x ) = V(1-exp(-Tx)) +K
- Mean Square Error: 0. - Data Set

Complete rc circuit lab report, Study Guides, Projects, Research of Physics

Related documents

Partial preview of the text

Download Complete rc circuit lab report and more Study Guides, Projects, Research Physics in PDF only on Docsity!

Sample Lab Report - PHYS 231

The following is an example of a well-written report that might be submitted by a PHYS 231

student.

• The report begins with a short statement of what is being measured, and why.

•The procedure and results are then briefly described for each major part of the exercise. Do not

reproduce the lab manual, but do specify any parameters you chose and any differences from the

suggested procedures.

•Single numbers may be put into the text, but if several values are needed they should be in a

table and perhaps a graph.

•Tables and graphs need to be well labeled, with quantity and units, and should be mentioned in

the text.

•The report ends with a summary or conclusion, if appropriate. The summary must be consistent

with the preceding data and analysis.

•You may prepare any or all portions of your reports by hand, as convenient, but be sure the text

is legible and figures are clear.

•Graphs should be done on graph paper or by computer, not as rough sketches.

PHYS 231 Experiment 3.14159 RC circuits

by A. Student

with O. K. Partner

Submitted February 30, 2753

Introduction

We studied the voltage across a capacitor as it charged or discharged through a known

resistor. The goal is to show that the charge/discharge follows an exponential function and that

the time constant is R’C, where R’ is the effective resistance of the voltmeter and resistor in

parallel.

Procedure and Results for charge/discharge curves

The circuits for charging and discharging the capacitor were set up as specified in the lab

manual. A stopwatch was started when the switch was thrown to start the charge/discharge, and

the DMM read at known times until the voltage essentially stopped changing.

Results for charging and discharging, with marked values R = 1 MΩ and C = 100 μF, are

shown in the attached graphs. The solid lines are fits to

V(1-exp(-Tx))+K charging

Vexp(-Tx)+K discharging

which were derived in the lab manual. These lines fit the data well, confirming that the charge

and discharge are exponential.

Procedure and Results for time constant

Only the discharging circuit was used for this part. The capacitor was charged to 10.0 V

and the time to discharge to 1/e of that value, 3.68 V, was measured with the stopwatch. The

discharge was repeated two or three times and averaged to reduce error. This was done for both

capacitors and again when connected in parallel. Resistor values were measured with the DMM

instead of using the marked values.

Data for the single capacitors is tabulated below

R

(ohm)

τ 100 μF

(sec)

τ ave 100 μF

(sec)

τ, 220 μF

(sec)

τ ave220 μF

(sec)

55.1K too short 13.72, 13.87, 13.56 13.

106.7K 11.58, 11.20, 11.86 11.55 25.95, 26.07, 25.256 25.

211.1K 21.47, 22.25, 22.50 22.07 50.47, 50.30 50.

.494M 50.12, 50.35 50.24 113.54, 113.65 113.

1.062M 100.87, 101.23 101.05 too long

t (sec)