for engineering students who is asked to present a report on a lab visit for the first time

1. Lab Report
Course ~ ES1111FOAE
Submitted To: Submitted BY:
Devika kataria ma`am RAJIKA PATEL
Roll No.:2021BTech094

2. Date: December 20, 2021
INTRODUCTION
Waveforms of voltage and current that vary periodically
with time may be characterized by their average value or
their root mean square (rms) value. Some of the
measuring instruments you will use respond to average
value of voltage or current , while other respond to rms
values.
OBJECTIVE
To determine the values of rms voltage for three types of
waveforms: a sinusoid, a square wave , and a triangular
wave. And also to understand the difference between a
true-rms and a conventional multimenter.
EQUIPMENT
Analog Discovery 2 instrument.
Digital Multimeter.
Resistance Box.
Oscilloscope

3. Sinusoidal wave
Peak-to-Peak Voltage: Use the vertical-
position knob to place a peak (positive or negative)
on a horizontal line, keeping the peak on the
screen. Use the horizontal-position knob to set the

4. next (opposite sign) peak on the center vertical line.
Count the number of divisions between the positive
and negative peaks
Frequency: Measure the period of the
signal (T). Calculate frequency (f) using f = 1/T.
Vrms : the square root of the time average of the voltage
squared. The value of Vrms is V0/ √2, or, equivalently, 0.707V0.
Sinusoidal wave value
1. Vpp 8.80v
2. frequency 3.019KHz

5. 3. Vrms 3.01v
4.
Vavg
2.71v
T=1/f=1/3.019*1000=0.33 * 10^-3seconds
Sine wave 𝑉𝑟𝑚𝑠 = 𝑉𝑝−𝑝 2 √2 2 ;
Sin wave Vavg= Vrms*2*2^1/2/3.14

6. Square wave
Square wave value

7. 1. Vpp 10.9v
2. frequency 3.041KHz
3. Vrms 4.73v
4.
Vavg 4.26v
T=1/f=1/3.019*1000=0.33 * 10^-3seconds
square wave 𝑉 𝑟𝑚𝑠 = 𝑉𝑝;
Vavg=Vrms*2*2^1/2/3.14

8. Triangular wave
Triangular wave value
1. Vpp 9.28v

9. 2. frequency 3..03KHz
3. Vrms 2.61v
4.
Vavg 2.35v
T=1/f=1/3.019*1000=0.33 * 10^-3seconds
triangle wave 𝑉𝑟𝑚𝑠 = 𝑉𝑝−𝑝 2
Triangle wave Vavg= Vrms*2*3^1/2/3.14

10. CONCLUSION :
Now we are able to calculate peak to peak value,
frequency, time, root mean square and average of
different waveforms using Osilloscope.
. REFERENCES :
Tektronix XYZs of Oscilloscopes. Online:
http://www.tek.com/Measurement/Osilloscope
Wikipedia. Online:
http://en.wikipedia.org/wiki/Oscilloscope