View source for ExpEYES/C3/Steady-state-response-of-circuits/English-timed

{| border=1
|'''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 diagram'''s 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 voltage at '''A1'''.

|-
|02:35
| '''Red''' trace is the voltage across the '''resistor'''.

|-
|02:39
| '''Blue''' trace is the voltage across the '''capacitor'''.

|-
|02:44
| On the 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 the '''frequency''' value to '''149.4Hz ''' and '''Inductor''' value to '''0 mH (zero 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 degrees'''.

|-
|04:20
|Let us calculate phase shift value using the formula: '''Φ (Phase shift) = 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 the 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 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''' 3.08degrees'''.

|-
|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 is '''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 degrees'''.

|-
|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.

|}