Add Abstract, Introduction and Conclusion to the Inductors in DC Circuits Lab. Input calculationElectric Circuits Lab

Instructor: ———–

Capacitors in DC Circuits

Student Name(s): Click or tap here to enter text.

Click or tap here to enter text.

Honor Pledge:

I pledge to support the Honor System of ECPI. I will refrain from any form of academic dishonesty or deception, such as cheating or plagiarism. I am aware that as a member of the academic community, it is my responsibility to turn in all suspected violators of the honor code. I understand that any failure on my part to support the Honor System will be turned over to a Judicial Review Board for determination. I will report to the Judicial Review Board hearing if summoned.

Date: 1/1/2018

Contents

Abstract 3

Introduction 3

Procedures 3

Data Presentation & Analysis 4

Calculations 4

Required Screenshots 4

Conclusion 4

References 5

Abstract

(This instruction box is to be deleted before submission of the Lab report)

What is an Abstract?

This should include a brief description of all parts of the lab. The abstract should be complete in itself. It should summarize the entire lab; what you did, why you did it, the results, and your conclusion. Think of it as a summary to include all work done. It needs to be succinct yet detailed enough for a person to know what this report deals with in its entirety.

Objectives of Week 3 Lab 1:

· Measure the resistance and capacitance.

· Familiarize with Oscilloscope and Function generator.

· Measure the RC time constant using VR and VC.

· Understand the effect of series and parallel capacitors on RC time constant.

Introduction

(This instruction box is to be deleted before submission of the Lab report)

What is an Introduction?

In your own words, explain the reason for performing the experiment and give a concise summary of the theory involved, including any mathematical detail relevant to later discussion in the report. State the objectives of the lab as well as the overall background of the relevant topic.

Address the following items in your Introduction:

· What is the time constant for an RC circuit and what is its significance?

· How do capacitors combine in series? (Give formula)

· How do capacitors combine in parallel? (Give formula)

· What is capacitive reactance? (Give formula)

Procedures

Part I:

1.

Construct the circuit shown in

Figure 1 in Mutism.

Figure 1: Series RC Circuit

2.

Connect Channel A of the oscilloscope across the voltage source and Channel B across the capacitor.

3.

Set the function generator to

5Vpp; 100 Hz, Square Wave 50% duty cycle with 2.5 DC offset if using a function generator

. If using clock voltage, set it to 5Vpp, 100 Hz. The DC offset can be modeled by using DC mode on the oscilloscope.

4.

Observe the signals on the scope screen. See

Figure 2(a) below. (Use Electric Circuits Lab

Capacitors in DC Circuits

I.

Objectives:

After completing this lab experiment, you should be able to:

· Measure the resistance and capacitance.

· Familiarize with Oscilloscope and Function generator.

· Measure the RC time constant using VR and VC.

· Understand the effect of series and parallel capacitors on RC time constant.

II.

Parts List:

· Resistor (1) 1 kΩ

· Capacitors (2) 0.22 µF

III.

Procedures:

Part I:

1.

Construct the circuit shown in

Figure 1 in Mutism.

Figure 1: Series RC Circuit

2.

Connect Channel A of the oscilloscope across the voltage source and Channel B across the capacitor.

3.

Set the function generator to

5Vpp; 100 Hz, Square Wave 50% duty cycle with 2.5 DC offset if using a function generator

. If using clock voltage, set it to 5Vpp, 100 Hz. The DC offset can be modeled by using DC mode on the oscilloscope.

4.

Observe the signals on the scope screen. See

Figure 2(a) below. (Use Volts/Div and Time/DIV settings to adjust the signal)

Figure 2(a): Voltage across the Voltage Source and the capacitor

5.

Disable Channel A, by setting it to 0, while observing Channel B. You should be able to see the waveform as shown below. Use time base and Channel A scale to adjust the signal.

Figure 2(b): Voltage across the capacitor

6. Change the time base (Sec/Div) until you have a clear waveform on the scope as shown in

Figure 2(c).

Figure 2(c): Voltage across the capacitor

7.

Calculate the time constant of the RC circuit using the circuit parameter values.

Record the result in

Table 1 under calculated value.

= R*C

Calculated value

Measured value using VC

Measured value using VR

Time constant ()

220.049us

220.015us

Table 1: Calculated and measured values

8.

Measuring the time constant with VC:

i.

Measure the peak value of the signal, by placing one of the cursors (T1) at the peak point ___5V______.

ii.

Calculate the 63% of the above value _____3.15 V____.

iii. Place the second cursor (T2) at the step (ii) value above and T1 at zero just before the capacitor voltage starts rising as shown in

Figure 3.

iv.

Observe the value of T2-T1 on the scope, which is the one time constant, as shown below.

v.

Record the result in

Table 1 above under measured value using VC.

Figure 5: Measuring RC time constant using VC

9.

Connect Channel B of the oscilloscope across the resistor.

10. You should be able to see the waveform as shown below. (Use Volts/Div and Time/DELECTRIC CIRCUITS I

METRIC PREFIX TABLE

Metric

Prefix

Symbol

Multiplier

(Traditional Notation)

Expo-

nential

Description

Yotta

Y

1,000,000,000,000,000,000,000,000

1024

Septillion

Zetta

Z

1,000,000,000,000,000,000,000

1021

Sextillion

Exa

E

1,000,000,000,000,000,000

1018

Quintillion

Peta

P

1,000,000,000,000,000

1015

Quadrillion

Tera

T

1,000,000,000,000

1012

Trillion

Giga

G

1,000,000,000

109

Billion

Mega

M

1,000,000

106

Million

kilo

k

1,000

103

Thousand

hecto

h

100

102

Hundred

deca

da

10

101

Ten

Base

b

1

100

One

deci

d

1/10

10-1

Tenth

centi

c

1/100

10-2

Hundredth

milli

m

1/1,000

10-3

Thousandth

micro

µ

1/1,000,000

10-6

Millionth

nano

n

1/1,000,000,000

10-9

Billionth

pico

p

1/1,000,000,000,000

10-12

Trillionth

femto

f

1/1,000,000,000,000,000

10-15

Quadrillionth

atto

a

1/1,000,000,000,000,000,000

10-18

Quintillionth

zepto

z

1/1,000,000,000,000,000,000,000

10-21

Sextillionth

yocto

y

1/1,000,000,000,000,000,000,000,000

10-24

Septillionth

4-BAND RESISTOR COLOR CODE TABLE

BAND

COLOR

DIGIT

Band 1: 1st Digit

Band 2: 2nd Digit

Band 3: Multiplier

(# of zeros

following 2nd digit)

Black

0

Brown

1

Red

2

Orange

3

Yellow

4

Green

5

Blue

6

Violet

7

Gray

8

White

9

Band 4: Tolerance

Gold

± 5%

SILVER

± 10%

5-BAND RESISTOR COLOR CODE TABLE

BAND

COLOR

DIGIT

Band 1: 1st Digit

Band 2: 2nd Digit

Band 3: 3rd Digit

Band 4: Multiplier

(# of zeros

following 3rd digit)

Black

0

Brown

1

Red

2

Orange

3

Yellow

4

Green

5

Blue

6

Violet

7

Gray

8

White

9

Gold

0.1

SILVER

0.01

Band 5: Tolerance

Gold

± 5%

SILVER

± 10%

EET Formulas & Tables Sheet

Page

1 of

21

UNIT 1: FUNDAMENTAL CIRCUITS

CHARGE

Where:

Q = Charge in Coulombs (C)

Note:

1 C = Total charge possessed by 6.25×1018 electrons

VOLTAGE

Where:

V = Voltage in Volts (V)

W = Energy in Joules (J)

Q = Charge in Coulombs (C)

CURRENT

Where:

I = Current in Amperes (A)

Q = Charge in Coulombs (C)

t = Time in seconds (s)

OHM’S LAW

Where:

I = Current in Amperes (A)

V = Voltage in Volts (V)

R = Resistance in Ohms (Ω)

RESISTIVITY

Where:

ρ = Resistivity in Circular Mil – Ohm per Foot (CM-Ω/ft)

A = Cross-sectional area in Circular Mils (CM)

R = Resistance in Ohms (Ω)

ɭ = Length in Feet (ft)

Note:

CM: Area of a wire with a 0.001 inch (1 mil) diameter

CONDUCTANCE

Where:

G = Conductance in Siemens (S)

R

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