Madhurig at 12:14, 16 January 2024

2024-01-16T12:14:47Z

Madhurig at 12:02, 16 January 2024

2024-01-16T12:02:06Z

Nirmala Venkat: Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' || Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. |- st..."

2024-01-16T08:12:42Z

Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' || Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. |- st..."

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{| border="1"
|-
|| '''Visual Cue'''
|| '''Narration'''
|-
|| '''Slide:1'''
|| Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| '''Slide 2:'''

'''Learning Objective'''
|| In this tutorial, we will learn how
* <div style="margin-left:1.27cm;margin-right:0cm;">'''Wheatstone Bridge''' is used to measure the unknown resistance in the circuit </div>
* <div style="margin-left:1.27cm;margin-right:0cm;">To check the balance condition of '''Wheatstone Bridge'''</div>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 3:'''

'''System Requirement'''
|| To record this tutorial, I am using:
* <div style="margin-left:1.27cm;margin-right:0cm;">'''Ubuntu Linux '''20.04 OS</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">'''CircuitJS''' Application</div>
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| '''Slide 4:'''

'''Prerequisite'''
|| To follow this tutorial, you should have a basic knowledge of,
* <div style="margin-left:1.27cm;margin-right:0cm;">Electrical circuits</div>
|- style="border:1pt solid #000000;padding:0.176cm;"
|| '''Wheatstone.png'''

|| We will make this circuit for the '''Wheatstone Bridge '''demonstration'''.'''
|- style="border:1pt solid #000000;padding:0.176cm;"
| style="color:#ff0000;" |
|| For a '''Wheatstone''' '''Bridge''' circuit, we require,
* <div style="margin-left:1.27cm;margin-right:0cm;">4 Resistors</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">1 DC Power supply of 12 Volts</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">1 Switch</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">1 Ammeter</div>

|- style="border:1pt solid #000000;padding:0.176cm;"
|| Click on '''File''' and select '''New Blank Circuit.'''
|| Let us open the '''Circuitjs''' interface.

In the menu bar, click on '''File''' and select '''New Blank Circuit.'''

|- style="border:1pt solid #000000;padding:0.176cm;"
|| Click on the '''Draw''' option >> select '''Add resistor.'''

Click and drag to draw a resistor.

Right-click on the resistor >> select the '''Duplicate '''option.
|| Click on the '''Draw''' option and select '''Add resistor.'''

Click and drag to draw a resistor as shown.

By default, the value of this resistor is 1 Kilo Ohm.

We need 4 resistors for this circuit.

Right-click on the resistor, and select the '''Duplicate '''option.

This will generate a resistor of the same value.

Repeat this process till you have 4 resistors in the work area.

<div style="color:#000000;">Align all these resistors in the same manner as shown.</div>

<div style="color:#000000;">Make sure they all are connected.</div>
|- style="border:1pt solid #000000;padding:0.176cm;"
||
|| Use the '''Add Text''' option to give labels to these multiple resistors.

Give the labels as P, Q, R, and S respectively as shown.
|- style="border:1pt solid #000000;padding:0.176cm;"
||

Point to junction
|| <div style="color:#252525;">After this connection, we can see that multiple junctions are formed.</div>

<span style="color:#252525;">To denote these junctions use the<span style="color:#252525;">'''Add Text '''<span style="color:#252525;">option to label them.

<span style="color:#252525;">Give labels as <span style="color:#252525;">'''A,'''<span style="color:#252525;"><span style="color:#252525;">'''B, C, '''<span style="color:#252525;">and<span style="color:#252525;">''' D '''<span style="color:#252525;">to these junctions as shown.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| Show the path to find the DC power supply and draw it

Click on '''Draw''', >> '''Inputs and Sources''' >>select '''Add Voltage Source (2-terminal).'''
Change the DC power supply value

|| <span style="color:#252525;">Next, we have to include the<span style="color:#252525;">'''DC'''<span style="color:#252525;"><span style="color:#252525;">'''power'''<span style="color:#252525;"><span style="color:#252525;">'''supply'''<span style="color:#252525;">.
Click on '''Draw''', go to''' Inputs and Sources.'''

Select '''Add Voltage Source (2-terminal).'''
Drag and draw the '''DC power '''supply in the working area.
<span style="color:#252525;">Change the voltage value of the<span style="color:#252525;">'''DC power'''<span style="color:#252525;"> supply to<span style="color:#252525;">'''12V'''<span style="color:#252525;">.
|- style="border:1pt solid #000000;padding:0.176cm;"
||

<span style="color:#252525;">Click on<span style="color:#252525;">'''Draw '''<span style="color:#252525;">>> go to the<span style="color:#252525;">'''Passive Component.'''

Select the '''Switch''' component.

Drag and draw the '''Switch''' in the work area.

|| We also need a '''Switch''' to turn ON and OFF the circuit.
<span style="color:#252525;">Click on<span style="color:#252525;">'''Draw'''<span style="color:#252525;"> and go to the<span style="color:#252525;">'''Passive Component.'''

Then select the '''Add''' '''Switch''' to select the switch component.

Drag and draw the '''Switch''' in the work area.

Connect the switch in series with the '''DC power''' supply.

|- style="border:1pt solid #000000;padding:0.176cm;"
||
|| In an ideal '''Wheatstone Bridge''' circuit, a '''galvanometer''' is used to calculate the current.

As '''Circuitjs''' platform does not have a '''galvanometer''' component, we will use an '''Ammeter'''.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| Click on '''Draw''', go to '''Outputs and Labels'''

Select the '''Add Ammeter.'''

Point to the circuit.
|| Click on '''Draw''', go to '''Outputs and Labels''' and

Select the '''Add Ammeter.'''

Draw it by dragging the cursor in the working area.

Connect the '''Ammeter''' between junctions B and D as shown in the circuit.
|- style="border:1pt solid #000000;padding:0.176cm;"
||
|| <div style="color:#252525;">We have all the required components in the work area.</div>

Now let's connect the components using wires.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| From the '''Draw''' menu, select '''Add wire.'''

Drag and draw a wire
|| From the '''Draw''' menu, select '''Add wire.'''

Drag and draw a wire by selecting the end points of the components as shown in the video.

Connect the junction A to the DC power supply.

Connect the junction C to the switch.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| Observe the yellow dots
|| Observe the yellow dots indicating the current flow direction in the circuit.

If you cannot see the yellow dots moving consistently, increase the current speed bar.

The current speed bar is available at the right-top corner of your screen.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| Change the P,Q,R,S resistor values to 200, 400 and 400 ohms respectively
|| <div style="color:#252525;">Let us now change the value of these resistors.</div>
Change the values of resistor P to 200 ohms.

Change the value of resistor Q and R to 400 ohms.

Let S be the unknown resistor.

Ignore the value of resistor S shown in the circuit.

Notice that the current value shown by the ammeter is 1.36 milli ampere.

|- style="border:1pt solid #000000;padding:0.176cm;"
|| Slide:

Wheatstone Bridge - Balanced condition
|| The '''Wheatstone Bridge '''is in a balanced condition, when the below conditions are fullfilled.
* <div style="margin-left:1.27cm;margin-right:0cm;">Ratio of resistance is P/Q = R/S, and</div>
* <div style="margin-left:1.27cm;margin-right:0cm;">The current flowing through the ammeter is Zero.</div>

|- style="border:1pt solid #000000;padding:0.176cm;"
|| Slide: Find unknown resistance

'''Wheatstone-balance.png'''

P = 200 Ohms
Q = 400 Ohms
R = 400 Ohms
S = ?
|| Let us find the value of resistor S using the '''Wheatstone Bridge '''balanced condition formula.

The values of resistors are,
P = 200 Ohms

Q = 400 Ohms

R = 400 Ohms

S = is unknown

The balanced condition formula P/Q = R/S becomes,

S = R x Q / P

Put the values of these resistors in the formula.

After calculation, the value of resistor S is 800 Ohms.

|- style="border:1pt solid #000000;padding:0.176cm;"
|| CircuitJS simulation window

Point to ammeter value
|| Now, let us go back to the '''Circuitjs''' simulation.

Let us change the value of resistor S to 800 ohms using the edit option.

Now the ammeter shows zero value.

This shows the '''Wheatstone Bridge''' is in balanced condition.

|- style="border:1pt solid #000000;padding:0.176cm;"
||
|| This brings us to the end of the tutorial.

Let us summarize.
|- style="border:1pt solid #000000;padding:0.176cm;"
|| Slide Summary
|| In this tutorial, we learnt how
* <div style="margin-left:1.27cm;margin-right:0cm;">The '''Wheatstone Bridge''' is used to measure unknown resistance in the circuit </div>
* <div style="margin-left:1.27cm;margin-right:0cm;">To check the balance condition in '''Wheatstone Bridge.'''</div>

|- style="border:1pt solid #000000;padding:0.176cm;"
|| Slide:

Assignment

|| As an assignment,

Change the values of resistor P to 60 ohms, resistor Q to 150 ohms, resistor R to 300 ohms. Use the '''Wheatstone Bridge''' balance condition formula to find the value of resistor S.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Slide :

About Spoken Tutorial project
|| The video at the following link summarizes the Spoken Tutorial project.

Please download and watch it.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Slide :Spoken Tutorial workshops
|| The '''Spoken Tutorial Project''' Team conducts workshops and gives certificates.

For more details, please write to us.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Slide : Forum for specific questions
|| Please post your timed queries in this forum.
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Acknowledgement
|| Spoken Tutorial project was established by the Ministry of Education(MoE), Govt of India
|- style="border:1pt solid #000000;padding-top:0cm;padding-bottom:0cm;padding-left:0.206cm;padding-right:0.191cm;"
|| Thank you
|| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.

Thank you for joining.
|-
|}

@@ Line 14: / Line 14: @@
 * '''Wheatstone Bridge''' is used to measure the unknown resistance in the circuit
 * To check the balance condition of '''Wheatstone Bridge'''
 |-
@@ Line 20: / Line 21: @@
 '''System Requirement'''
 || To record this tutorial, I am using:
 * '''Ubuntu Linux '''20.04 OS
 * '''CircuitJS''' Application
 |-
@@ Line 83: / Line 86: @@
 || Show the path to find the DC power supply and draw it
-Click on '''Draw''', >> '''Inputs and Sources''' >>select '''Add Voltage Source (2-terminal).'''
+Click on '''Draw''', >> '''Inputs and Sources''' >> select '''Add Voltage Source (2-terminal).'''
 Change the DC power supply value
@@ Line 92: / Line 96: @@
 Select '''Add Voltage Source (2-terminal).'''
-Drag and draw the '''DC power '''supply in the working area.
+Drag and draw the '''DC power ''' supply in the working area.
-Change the voltage value of the'''DC power''' supply to'''12V'''.
+Change the voltage value of the '''DC power''' supply to '''12V'''.
 |-
 || Click on'''Draw '''>> go to the'''Passive Component.'''
@@ Line 104: / Line 108: @@
 || We also need a '''Switch''' to turn ON and OFF the circuit.
-Click on'''Draw''' and go to the'''Passive Components'''.
+Click on'''Draw''' and go to the '''Passive Components'''.
 Then select '''Add Switch''' to select the switch component.
@@ Line 154: / Line 158: @@
 The current speed bar is available at the right-top corner of your screen.
 |-
-|| Change the P,Q,R,S resistor values to 200, 400 and 400 ohms respectively
+|| Change the P, Q, R, S resistor values to 200, 400 and 400 ohms respectively.
 || Let us now change the value of these resistors.
 Change the values of resistor P to 200 ohms.
@@ Line 171: / Line 176: @@
 Wheatstone Bridge - Balanced condition
 || The '''Wheatstone Bridge '''is in a balanced condition, when the below conditions are fullfilled.
 * Ratio of resistance is P/Q = R/S, and
 * The current flowing through the ammeter is Zero.

CircuitJS/C2/Wheatstone-Bridge/English - Revision history

Madhurig at 12:14, 16 January 2024

Madhurig at 12:02, 16 January 2024

Nirmala Venkat: Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' || Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. |- st..."