ExpEYES/C3/Steady-state-response-of-circuits/English-timed

Time	Narration
00:01	Hello everyone. Welcome to this tutorial on Steady State Response of Circuits.
00:07	In this tutorial, we will study: AC phase shift in RC, RL and LCR circuits. Calculate Phase shift values and Show circuit diagrams for our experiments.
00:24	Here, I am using: ExpEYES version 3.1.0 Ubuntu Linux OS version 14.10
00:34	To follow this tutorial, you should be familiar with: Basic Physics and ExpEYES Junior interface. If not, for relevant tutorials in ExpEYES, please visit our website.
00:50	Let's first define Steady state response of a circuit.
00:55	Steady state response is a period of observance when a circuit is in equilibrium condition.
01:02	Now we will define phase shift. Phase shift is a relative change in the phase of a waveform.
01:10	Let us now study AC phase shift in RC circuit.
01:14	In this experiment, we will measure voltage variation and phase shift in the circuit.
01:20	To perform this experiment, A1 is connected to SINE. 1uF(one micro farad) capacitor is connected between SINE and A2. 1K resistor is connected between A2 and ground (GND).
01:36	This is the circuit diagram.
01:40	Let's see the result on the Plot window.
01:44	On the Plot window, click on A1 and drag to CH1. A1 is assigned to CH1.
01:54	Click on A2 and drag to CH2. A2 is assigned to CH2.
02:02	Move the mSec/div slider to obtain the Sine waves.
02:08	Click on EXPERIMENTS button. Select Study of AC circuits.
02:14	Study of AC Circuits and Schematic windows open. Schematic window shows the circuit diagram.
02:24	Study of AC Circuits window displays three traces with different voltages.
02:30	Black trace is applied total voltage at A1.
02:35	Red trace is voltage across the resistor.
02:39	Blue trace is voltage across the capacitor.
02:44	On right side of the window, we can see Phasor plot.
02:49	On the plot, positive X axis represents voltage across resistor.
02:56	Positive Y axis represents voltage across inductor.
03:02	Negative Y axis represents voltage across capacitor.
03:08	Frequency of the waves is 149.4Hz. Total voltage at A1 is 3.54V. Voltage across R at A2 is 2.50V. Voltage at A1-A2 is 2.43V. Phase Shift is 43.1 deg(degree).
03:34	Calculator shows default values of frequency, resistance, capacitance and inductance.
03:44	Change frequency value to 149.4Hz and Inductor value to 0(zero) mH(milli henry).
03:53	Click on Calculate XL, XC and Angle button.
03:59	The values of XC, XL and phase angle are displayed. XC and XL are Impedences of capacitance and inductance.
04:11	Dphi is phase shift. Calculated Phase shift is 46.8 deg.
04:20	Let us calculate Phase shift Φ = arctan(XC/XR), where XC=1/2πfC. Here f is frequency in hertz, C is capacitance in farads. Calculated value of phase shift is 46.81 deg.
04:48	Now we will study AC phase shift in RL circuit.
04:52	In this experiment, we will measure phase shift when capacitor is replaced by an inductor.
04:59	To perform this experiment, A1 is connected to SINE. A 3000 turns coil is connected between SINE and A2.
05:11	560 Ohm resistor is connected between A2 and GND. This is the circuit diagram.
05:20	Let's see the result on the Plot window.
05:24	Two sine waves are generated.
05:27	Click on EXPERIMENTS button, select Study of AC circuits. Study of AC Circuits window opens.
05:38	On right side of the window, we can see Phasor plot.
05:43	You can see that Phase Shift is -2.7 deg(minus 2.7 degree). Notice the values of frequency and voltages.
05:53	Change the value of: Frequency to 149.4Hz(hertz) Resistance to 1360 Ohm Capactance to 0 uF(micro farad) and inductance to 78 mH(milli henry).
06:11	Click on Calculate XL, XC and Angle button to view the values. Calculated phase shift value is -3.1 deg(minus 3.1 degree).
06:23	Let us calculate phase shift value using the formula.
06:27	Phase shift Φ = arctan(XL/XR), where XL=2πfL. Here L is inductance.
06:41	External resistance value is 560 Ohm and resistance of the coil is 800 Ohm. Total resistance=( 560 Ohm + 800 Ohm)=1360 Ohm. Calculated value of the phase shift is 3.08deg.
07:05	Now we will study AC phase shift in LCR circuit.
07:10	We will measure phase shift when inductor & capacitor are connected in the circuit.
07:17	To perform this experiment, SINE is connected to A1.
07:21	Coil and 1 uF(1 micro farad) capacitor are connected between A1 and A2.
07:28	1K resistor is connected between A2 and ground (GND). This is the circuit diagram.
07:36	Let's see the result on the Plot window.
07:39	Two sine waves are generated with a phase shift.
07:43	Click on EXPERIMENTS button, select Study of AC Circuits.
07:50	Study of AC Circuits and Schematic windows open. Schematic window shows the circuit diagram.
07:59	Study of AC Circuits window displays three sine waves with different voltages.
08:06	On right side of the window, we can see Phasor plot.
08:11	Frequency of the waves is 149.4Hz, Total voltage at A1 is 3.53V, Voltage across R at A2 is 2.50V, Voltage of LC across A1-A2 is 2.42V.
08:33	Phase Shift 43.1 deg(degree).
08:37	Change the value of: frequency to 149.4Hz and inductance to 78mH(milli Henry).
08:48	Click on Calculate XL, XC and Angle button to view the values. Calculated phase shift value is 44.8 deg.
09:00	Let us calculate Phase shift value using the formula.
09:04	Phase shift Φ =arctan(XC – XL/XR).
09:10	External resistance value is 1000 Ohm. Calculated value of the phase shift is 44.77 deg.
09:20	Let us summarize.
09:22	In this tutorial, we have studied- AC phase shift in RC, RL and LCR circuits and Calculated the Phase shift values.
09:33	As an assignment, Study AC Phase shift of RL and LCR circuits, using different Resistance & capacitance values.
09:44	This video summarizes the Spoken Tutorial project. If you do not have good bandwidth, you can download and watch it.
09:52	We conduct workshops using Spoken Tutorials and give certificates. Please contact us.
09:59	The Spoken Tutorial Project is funded by NMEICT, MHRD Government of India.
10:06	This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi. Thank you for joining.

Contributors and Content Editors

Pratik kamble, Sandhya.np14