Difference between revisions of "CircuitJS/C2/Wheatstone-Bridge/English"
From Script | Spoken-Tutorial
(Created page with " {| border="1" |- || '''Visual Cue''' || '''Narration''' |- || '''Slide:1''' || Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. |- st...") |
|||
| Line 7: | Line 7: | ||
|| '''Slide:1''' | || '''Slide:1''' | ||
|| Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. | || Welcome to the spoken tutorial on '''Wheatstone Bridge''' using'''Circuitjs''' simulator. | ||
| − | |- | + | |- |
|| '''Slide 2:''' | || '''Slide 2:''' | ||
'''Learning Objective''' | '''Learning Objective''' | ||
| − | || In this tutorial, we will learn how | + | || In this tutorial, we will learn how, |
| − | * | + | |
| − | * | + | * '''Wheatstone Bridge''' is used to measure the unknown resistance in the circuit |
| − | |- | + | * To check the balance condition of '''Wheatstone Bridge''' |
| + | |- | ||
|| '''Slide 3:''' | || '''Slide 3:''' | ||
'''System Requirement''' | '''System Requirement''' | ||
|| To record this tutorial, I am using: | || To record this tutorial, I am using: | ||
| − | * | + | * '''Ubuntu Linux '''20.04 OS |
| − | * | + | * '''CircuitJS''' Application |
| − | |- | + | |- |
|| '''Slide 4:''' | || '''Slide 4:''' | ||
'''Prerequisite''' | '''Prerequisite''' | ||
|| To follow this tutorial, you should have a basic knowledge of, | || To follow this tutorial, you should have a basic knowledge of, | ||
| − | * | + | * Electrical circuits |
| − | |- | + | |- |
|| '''Wheatstone.png''' | || '''Wheatstone.png''' | ||
| − | + | || We will make this circuit for the '''Wheatstone Bridge '''demonstration'''. | |
| − | || We will make this circuit for the '''Wheatstone Bridge '''demonstration'''. | + | |- |
| − | |- | + | || |
| − | | | + | |
|| For a '''Wheatstone''' '''Bridge''' circuit, we require, | || For a '''Wheatstone''' '''Bridge''' circuit, we require, | ||
| − | * | + | * 4 Resistors |
| − | * | + | * 1 DC Power supply of 12 Volts |
| − | * | + | * 1 Switch and |
| − | * | + | * 1 Ammeter |
| − | |- | + | |- |
|| Click on '''File''' and select '''New Blank Circuit.''' | || Click on '''File''' and select '''New Blank Circuit.''' | ||
|| Let us open the '''Circuitjs''' interface. | || Let us open the '''Circuitjs''' interface. | ||
| − | In the menu bar, click on '''File''' and select '''New Blank Circuit | + | In the menu bar, click on '''File''' and select '''New Blank Circuit'''. |
| − | |- | + | |- |
|| Click on the '''Draw''' option >> select '''Add resistor.''' | || Click on the '''Draw''' option >> select '''Add resistor.''' | ||
| Line 59: | Line 59: | ||
We need 4 resistors for this circuit. | We need 4 resistors for this circuit. | ||
| − | Right-click on the resistor, and select the '''Duplicate '''option. | + | Right-click on the resistor, and select the '''Duplicate ''' option. |
This will generate a resistor of the same value. | This will generate a resistor of the same value. | ||
| Line 65: | Line 65: | ||
Repeat this process till you have 4 resistors in the work area. | Repeat this process till you have 4 resistors in the work area. | ||
| − | + | Align all these resistors in the same manner as shown. | |
| − | + | Make sure they all are connected. | |
| − | |- | + | |- |
| − | || | + | ||Select '''Add text''' option. |
|| Use the '''Add Text''' option to give labels to these multiple resistors. | || Use the '''Add Text''' option to give labels to these multiple resistors. | ||
Give the labels as P, Q, R, and S respectively as shown. | Give the labels as P, Q, R, and S respectively as shown. | ||
| − | |- | + | |- |
| − | || | + | || Point to junction |
| − | + | || After this connection, we can see that multiple junctions are formed. | |
| − | Point to junction | + | |
| − | || | + | |
| − | + | To denote these junctions use the '''Add Text '''option to label them. | |
| − | + | Give labels as '''A''','''B''', '''C''', and ''' D''' to these junctions as shown. | |
| − | |- | + | |- |
|| Show the path to find the DC power supply and draw it | || Show the path to find the DC power supply and draw it | ||
| Line 88: | Line 86: | ||
Change the DC power supply value | Change the DC power supply value | ||
| − | || | + | || Next, we have to include the '''DC power supply'''. |
| − | Click on '''Draw''', go to''' Inputs and Sources | + | |
| + | Click on '''Draw''', go to''' Inputs and Sources'''. | ||
Select '''Add Voltage Source (2-terminal).''' | 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'''. | |
| + | |- | ||
| + | || Click on'''Draw '''>> go to the'''Passive Component.''' | ||
Select the '''Switch''' component. | Select the '''Switch''' component. | ||
| Line 104: | Line 103: | ||
|| We also need a '''Switch''' to turn ON and OFF the circuit. | || We also need a '''Switch''' to turn ON and OFF the circuit. | ||
| − | |||
| − | + | Click on'''Draw''' and go to the'''Passive Components'''. | |
| + | |||
| + | Then select '''Add Switch''' to select the switch component. | ||
Drag and draw the '''Switch''' in the work area. | Drag and draw the '''Switch''' in the work area. | ||
| Line 112: | Line 112: | ||
Connect the switch in series with the '''DC power''' supply. | Connect the switch in series with the '''DC power''' supply. | ||
| − | |- | + | |- |
| − | || | + | || Point the Wheatstone bridge circuit. |
|| In an ideal '''Wheatstone Bridge''' circuit, a '''galvanometer''' is used to calculate the current. | || 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'''. | As '''Circuitjs''' platform does not have a '''galvanometer''' component, we will use an '''Ammeter'''. | ||
| − | |- | + | |- |
|| Click on '''Draw''', go to '''Outputs and Labels''' | || Click on '''Draw''', go to '''Outputs and Labels''' | ||
| Line 123: | Line 123: | ||
Point to the circuit. | Point to the circuit. | ||
| − | || Click on '''Draw''', go to '''Outputs and Labels''' | + | || Click on '''Draw''', go to '''Outputs and Labels'''. |
Select the '''Add Ammeter.''' | Select the '''Add Ammeter.''' | ||
| Line 130: | Line 130: | ||
Connect the '''Ammeter''' between junctions B and D as shown in the circuit. | Connect the '''Ammeter''' between junctions B and D as shown in the circuit. | ||
| − | |- | + | |- |
| − | || | + | || Cursor in the work area. |
| − | || | + | || We have all the required components in the work area. |
Now let's connect the components using wires. | Now let's connect the components using wires. | ||
| − | |- | + | |- |
|| From the '''Draw''' menu, select '''Add wire.''' | || From the '''Draw''' menu, select '''Add wire.''' | ||
Drag and draw a wire | Drag and draw a wire | ||
| − | || From the '''Draw''' menu, select '''Add 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. | Drag and draw a wire by selecting the end points of the components as shown in the video. | ||
| Line 146: | Line 146: | ||
Connect the junction C to the switch. | Connect the junction C to the switch. | ||
| − | |- | + | |- |
| − | || Observe the yellow dots | + | || Observe the yellow dots in the circuit. |
|| Observe the yellow dots indicating the current flow direction in the circuit. | || Observe the yellow dots indicating the current flow direction in the circuit. | ||
| Line 153: | Line 153: | ||
The current speed bar is available at the right-top corner of your screen. | 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. | Change the values of resistor P to 200 ohms. | ||
| Line 164: | Line 164: | ||
Ignore the value of resistor S shown in the circuit. | Ignore the value of resistor S shown in the circuit. | ||
| − | Notice that the current value shown by the ammeter is 1.36 milli | + | Notice that the current value shown by the ammeter is 1.36 milli amperes. |
| − | |- | + | |- |
|| Slide: | || Slide: | ||
Wheatstone Bridge - Balanced condition | Wheatstone Bridge - Balanced condition | ||
|| The '''Wheatstone Bridge '''is in a balanced condition, when the below conditions are fullfilled. | || 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. |
| − | |- | + | |- |
|| Slide: Find unknown resistance | || Slide: Find unknown resistance | ||
| Line 202: | Line 202: | ||
After calculation, the value of resistor S is 800 Ohms. | After calculation, the value of resistor S is 800 Ohms. | ||
| − | |- | + | |- |
|| CircuitJS simulation window | || CircuitJS simulation window | ||
| Line 214: | Line 214: | ||
This shows the '''Wheatstone Bridge''' is in balanced condition. | This shows the '''Wheatstone Bridge''' is in balanced condition. | ||
| − | |- | + | |- |
|| | || | ||
|| This brings us to the end of the tutorial. | || This brings us to the end of the tutorial. | ||
Let us summarize. | Let us summarize. | ||
| − | |- | + | |- |
|| Slide Summary | || Slide Summary | ||
|| In this tutorial, we learnt how | || In this tutorial, we learnt how | ||
| − | * | + | * The '''Wheatstone Bridge''' is used to measure unknown resistance in the circuit |
| − | * | + | * To check the balance condition in '''Wheatstone Bridge'''. |
| − | |- | + | |- |
|| Slide: | || Slide: | ||
| Line 232: | Line 232: | ||
|| As an 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. | + | 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. | ||
| + | |- | ||
|| Slide : | || Slide : | ||
| Line 240: | Line 242: | ||
Please download and watch it. | Please download and watch it. | ||
| − | |- | + | |- |
|| Slide :Spoken Tutorial workshops | || Slide :Spoken Tutorial workshops | ||
|| The '''Spoken Tutorial Project''' Team conducts workshops and gives certificates. | || The '''Spoken Tutorial Project''' Team conducts workshops and gives certificates. | ||
For more details, please write to us. | For more details, please write to us. | ||
| − | |- | + | |- |
|| Slide : Forum for specific questions | || Slide : Forum for specific questions | ||
|| Please post your timed queries in this forum. | || Please post your timed queries in this forum. | ||
| − | |- | + | |- |
|| Acknowledgement | || Acknowledgement | ||
|| Spoken Tutorial project was established by the Ministry of Education(MoE), Govt of India | || Spoken Tutorial project was established by the Ministry of Education(MoE), Govt of India | ||
| − | |- | + | |- |
|| Thank you | || Thank you | ||
|| This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay. | || This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay. | ||
Revision as of 17:32, 16 January 2024
| Visual Cue | Narration |
| Slide:1 | Welcome to the spoken tutorial on Wheatstone Bridge usingCircuitjs simulator. |
| Slide 2:
Learning Objective |
In this tutorial, we will learn how,
|
| Slide 3:
System Requirement |
To record this tutorial, I am using:
|
| Slide 4:
Prerequisite |
To follow this tutorial, you should have a basic knowledge of,
|
| Wheatstone.png | We will make this circuit for the Wheatstone Bridge demonstration. |
For a Wheatstone Bridge circuit, we require,
| |
| 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. |
| 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. Align all these resistors in the same manner as shown. Make sure they all are connected. |
| Select Add text option. | Use the Add Text option to give labels to these multiple resistors.
Give the labels as P, Q, R, and S respectively as shown. |
| Point to junction | After this connection, we can see that multiple junctions are formed.
To denote these junctions use the Add Text option to label them. Give labels as A,B, C, and D to these junctions as shown. |
| 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 |
Next, we have to include the DC power supply.
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. Change the voltage value of theDC power supply to12V. |
| Click onDraw >> go to thePassive 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.
Click onDraw and go to thePassive Components. Then select 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. |
| Point the Wheatstone bridge circuit. | 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. |
| Click on Draw, go to Outputs and Labels
Select the Add Ammeter. Point to the circuit. |
Click on Draw, go to Outputs and Labels.
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. |
| Cursor in the work area. | We have all the required components in the work area.
Now let's connect the components using wires. |
| 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. |
| Observe the yellow dots in the circuit. | 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. |
| 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. 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 amperes. |
| Slide:
Wheatstone Bridge - Balanced condition |
The Wheatstone Bridge is in a balanced condition, when the below conditions are fullfilled.
|
| 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. |
| 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. |
| This brings us to the end of the tutorial.
Let us summarize. | |
| Slide Summary | In this tutorial, we learnt how
|
| 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. |
| Slide :
About Spoken Tutorial project |
The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
| Slide :Spoken Tutorial workshops | The Spoken Tutorial Project Team conducts workshops and gives certificates.
For more details, please write to us. |
| Slide : Forum for specific questions | Please post your timed queries in this forum. |
| Acknowledgement | Spoken Tutorial project was established by the Ministry of Education(MoE), Govt of India |
| Thank you | This tutorial has been contributed by FOSSEE and Spoken Tutorial Project, IIT Bombay.
Thank you for joining. |
