CircuitJS/C2/Ohm's-Law-using-CircuitJS-simulator/English
| Visual Cue | Narration |
| Slide:1 | Welcome to the spoken tutorial on Ohm’s Law using circuitjs simulator. |
| Slide 2:
Learning Objectives |
In this tutorial, we will learn how
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| Slide 3
System Requirement |
To record this tutorial, I am using:
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| Slide 4:
Prerequisites |
To follow this tutorial, you should have a basic knowledge of
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| Slide 5:
What is Ohm's Law? |
Ohm’s Law equation is V = I x R.
V is the voltage across the conductor measured in Volts. I is the current flowing through the conductor measured in Amperes. R is the resistance provided by the conductor measured in Ohms. |
| Show the diagram
Ohms’ law circuit Ohm’s Law Circuit.png |
To verify Ohm’s law we will use this circuit for demonstration.
For this experiment, we need
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| Show the Circuit image. | We will learn how to create the same circuit in Circuitjs simulator and understand the concepts. |
| type ./circuitjs1 at the terminal prompt. | Let us open the circuitjs interface as shown. |
| Click on the Draw option
Browse through the menu |
In the menu bar, click on File and select New Blank Circuit.
Click on the Draw option in the menu bar. Now, select Add resistor. Click and drag to draw a resistor as shown. |
| Show the path to find the DC power supply and draw it
Draw => Inputs and Sources => Add Voltage Terminal. Right-click on the voltage source component >> select Swap Terminals. |
Now, let us add the DC power supply to the circuit.
Click on Draw, then go to Inputs and Sources, and select Add Voltage Source (2-terminal). Draw the voltage source above the resistor. Make sure that positive end of the voltage source is on the left side. In this case, we need to change the direction of the voltage source. Right-click on the voltage source component and select Swap Terminals. You will notice the polarity of the voltage source changes. We want a DC voltage source of 1.5 volts, but it is set to 5 volts by default. To change it, right-click the voltage source. Then select the edit option. A pop-up window will open. Delete the value 5 and type 1.5 and click the OK button to save the change. |
| Right-click on the DC voltage source >> select the Duplicate option. | We need three more of these same DC voltage sources connected one after another.
Right-click on the DC voltage source, and select the Duplicate option. Do this, two more times to make three copies of the DC voltage source. Move and link all four DC voltage sources together in a row as shown. Make sure that parts don't overlap when you connect them. Next let us label these voltage sources. Click on the Draw button, then go to Output and Labels and select Add Text. Move the cursor to the working space and click and drag. A default hello text will appear. Double click on the hello word to edit the text to V1 and click on the OK button. Repeat the same steps and label the other voltage sources as V2,V3 and V4. Arrange the label for a neat look. |
| Draw => Outputs and Labels => Ammeter | To measure the current in the circuit, we will use Ammeter.
Click on the Draw button, then go to Output and Labels and select Add Ammeter. Now, connect the ammeter to the resistor in the circuit. |
| Draw => Outputs and Labels => Voltmeter / Scope probe | Let us add a voltmeter across the resistor to see the amount of voltage passing through it.
Click on Draw and select Outputs and Labels. Then select Add Voltmeter/Scope probe. Place it below the resistor as shown. |
| Draw => Passive Components => Switch | We also need a Switch to turn ON and OFF the circuit.
In the Draw menu, select Passive components and Add switch. Drag and connect the switch next to the Ammeter. |
| Point to the components. | We have all the required components in the work area.
Now let's connect the components using wires. |
| Add Wire
Draw => Add wire |
From the Draw menu, select Add wire.
Connect the resistor and voltmeter as shown. You will notice a white dot at the end points of the connection. This dot represents a junction which also implies the connection is right. |
| Connect the positive end of the V1 power supply to the resistor. | Connect the positive end of the V1 power supply to the resistor as shown.
Create a wire connection between the Switch and V1 power supply as shown. |
| Resistor Values.png - highlight the right bottom value | Observe the yellow dots indicating the current flow direction in the circuit.
Observe the current reading across the Ammeter. Place the cursor on the resistor component. You will see its characteristics at the bottom right of the screen. Current flowing through the resistor is denoted by I and is 1.5 milliamperes. The voltage across the resistor denoted by Vd is 1.5 Volts. You can see the resistor value denoted by R is 1K Ohm. Make sure to write down the readings of each component in the circuit. Note the current readings in milliamperes (mA). Convert to amperes (A) and record the current accordingly. |
| Slide:
Ohm’s Law: Relationship I,V,R I = V / R V = I x R R = V / I |
Ohm's Law helps us find the third parameter when we know any two parameters:
I = V/R
V = I x R
R = V/I |
| Only Narration | This brings us to the end of the tutorial. Let us summarize. |
| Slide summary | In this tutorial, we learnt how
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| Assignment 1 | As an assignment do the following
Tips: To change the value of any component, select the component and right click and select edit option to change the values. |
| Assignment 2
Assignment 2 - Circuit.png |
As an assignment
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| Slide :About Spoken Tutorial project | The video at the following link summarizes the Spoken Tutorial project.
Please download and watch it. |
| Slide :
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| 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.
Thanks for watching. |
