Difference between revisions of "ExpEYES/C2/Electro-Magnetism/English-timed"
From Script | Spoken-Tutorial
Sandhya.np14 (Talk | contribs) |
Sandhya.np14 (Talk | contribs) |
||
| Line 11: | Line 11: | ||
| In this tutorial, we will demonstrate: | | In this tutorial, we will demonstrate: | ||
| − | * Electro-magnetic induction | + | * '''Electro-magnetic induction''' |
* Mutual induction of coils | * Mutual induction of coils | ||
| Line 17: | Line 17: | ||
* Voltage induced by a rotating magnet | * Voltage induced by a rotating magnet | ||
| − | * Resonance of driven pendulum | + | * '''Resonance''' of driven pendulum |
| − | and show circuit | + | and show '''circuit diagram'''s for our experiments. |
|- | |- | ||
| Line 32: | Line 32: | ||
|- | |- | ||
|00:47 | |00:47 | ||
| − | | Let's begin with demonstration of '''Electro-magnetic Induction'''. | + | | Let's begin with the demonstration of '''Electro-magnetic Induction'''. |
|- | |- | ||
|00:52 | |00:52 | ||
| − | |In this experiment, wires of 3000 turns coil are connected to '''ground(GND)''' and ''' A1'''. | + | |In this experiment, wires of 3000 turns coil are connected to '''ground (GND)''' and ''' A1'''. |
|- | |- | ||
|01:00 | |01:00 | ||
|To show the magnetic effect, a magnet with ''5mm'' diameter and ''10mm'' length is used. | |To show the magnetic effect, a magnet with ''5mm'' diameter and ''10mm'' length is used. | ||
| − | This is the circuit diagram. | + | This is the '''circuit diagram'''. |
|- | |- | ||
| Line 69: | Line 69: | ||
|- | |- | ||
|01:46 | |01:46 | ||
| − | | Two new windows | + | | Two new windows- '''Electromagnetic Induction''' and '''Schematic''' appear. |
'''Schematic''' window shows the '''circuit diagram'''. | '''Schematic''' window shows the '''circuit diagram'''. | ||
| Line 82: | Line 82: | ||
|- | |- | ||
|02:12 | |02:12 | ||
| − | |This indicates voltage is | + | |This indicates voltage is induced in the coil by a moving magnet. |
|- | |- | ||
|02:18 | |02:18 | ||
| − | | Next I will demonstrate '''mutual induction''' of two coils. | + | | Next, I will demonstrate '''mutual induction''' of two coils. |
|- | |- | ||
|02:23 | |02:23 | ||
| − | | In this experiment, '''A2''' is connected to '''SINE'''. '''SINE''' is connected to '''ground'''( | + | | In this experiment, '''A2''' is connected to '''SINE'''. '''SINE''' is connected to '''ground'''(GND) through a coil. |
|- | |- | ||
|02:31 | |02:31 | ||
| − | |And ''' A1''' is connected to '''ground(GND)''' through a coil. This is the circuit diagram. | + | |And '''A1''' is connected to '''ground (GND)''' through a coil. This is the circuit diagram. |
|- | |- | ||
| Line 110: | Line 110: | ||
|- | |- | ||
|02:55 | |02:55 | ||
| − | |Move the '''msec/div''' slider to view '''applied waveform''' and '''induced waveform'''. | + | |Move the '''msec/div''' slider to view the '''applied waveform''' and '''induced waveform'''. |
|- | |- | ||
| Line 122: | Line 122: | ||
|- | |- | ||
|03:20 | |03:20 | ||
| − | |We have inserted a screw driver to '''induce voltage''' on the secondary coil. | + | |We have inserted a screw driver to '''induce voltage''' on the '''secondary coil'''. |
|- | |- | ||
| Line 135: | Line 135: | ||
|- | |- | ||
|03:47 | |03:47 | ||
| − | | Next we will demonstrate '''voltage induced''' by a rotating magnet using '''DC motor''' and coils. | + | | Next, we will demonstrate '''voltage induced''' by a rotating magnet using '''DC motor''' and coils. |
|- | |- | ||
| Line 141: | Line 141: | ||
| In this experiment, | | In this experiment, | ||
'''A1''' is connected to '''ground(GND)''' through a coil. | '''A1''' is connected to '''ground(GND)''' through a coil. | ||
| − | |||
'''SQR2''' is connected to '''ground(GND)''' through a '''DC motor'''. | '''SQR2''' is connected to '''ground(GND)''' through a '''DC motor'''. | ||
| Line 159: | Line 158: | ||
|- | |- | ||
|04:23 | |04:23 | ||
| − | | Under '''Setting Square waves''', set the frequency value to '''100Hz'''. Click on '''SQR2''' check box. | + | | Under '''Setting Square waves''', set the frequency value to '''100Hz'''. Click on '''SQR2''' check-box. |
|- | |- | ||
| Line 171: | Line 170: | ||
|- | |- | ||
|04:47 | |04:47 | ||
| − | |Move the '''msec/div''' slider to obtain the wave form. | + | |Move the '''msec/div''' '''slider''' to obtain the wave form. |
Move the''' volt/div''' slider to adjust the wave form. | Move the''' volt/div''' slider to adjust the wave form. | ||
| Line 182: | Line 181: | ||
|- | |- | ||
|05:05 | |05:05 | ||
| − | | On the right side, you can see voltage and frequency. Please note, voltage and frequency values of the two alternating | + | | On the right side, you can see voltage and frequency. Please note, voltage and frequency values of the two alternating waveforms are almost the same. |
|- | |- | ||
| Line 206: | Line 205: | ||
|- | |- | ||
|05:47 | |05:47 | ||
| − | |Button magnets are suspended in front of the coil with a paper strip as a | + | |Button magnets are suspended in front of the coil with a paper strip as a pendulum. This is the circuit diagram. |
|- | |- | ||
| Line 223: | Line 222: | ||
|06:15 | |06:15 | ||
|Two windows appear- | |Two windows appear- | ||
| − | '''Schematic of Driven Pendulum''' and '''EYES Junior: Driven Pendulum'''. | + | '''Schematic''' of '''Driven Pendulum''' and '''EYES Junior: Driven Pendulum'''. |
|- | |- | ||
| Line 242: | Line 241: | ||
| In this tutorial, we have learnt to demonstrate: | | In this tutorial, we have learnt to demonstrate: | ||
| − | * Electromagnetic induction | + | * '''Electromagnetic induction''' |
| − | * Mutual induction of coils | + | * '''Mutual induction''' of coils |
* Voltage induced by a rotating magnet | * Voltage induced by a rotating magnet | ||
* Resonance of driven pendulum | * Resonance of driven pendulum | ||
| − | + | and show circuit diagrams for our experiments. | |
|- | |- | ||
| Line 255: | Line 254: | ||
| As an assignment, demonstrate: | | As an assignment, demonstrate: | ||
| − | * How to make an electromagnet | + | * How to make an '''electromagnet''' |
* Mutual induction of a single coil with a magnet | * Mutual induction of a single coil with a magnet | ||
| Line 263: | Line 262: | ||
|- | |- | ||
|07:22 | |07:22 | ||
| − | |This video summarizes the Spoken Tutorial project. | + | |This video summarizes the '''Spoken Tutorial''' project. |
If you do not have good bandwidth, you can download and watch it. | If you do not have good bandwidth, you can download and watch it. | ||
Revision as of 16:48, 16 May 2016
| Time | Narration |
| 00:01 | Hello everyone. Welcome to this tutorial on Electro-magnetic induction. |
| 00:06 | In this tutorial, we will demonstrate:
and show circuit diagrams for our experiments. |
| 00:26 | Here, I am using:
|
| 00:35 | To follow this tutorial, you should be familiar with ExpEYES Junior interface. If not, for relevant tutorials, please visit our website. |
| 00:47 | Let's begin with the demonstration of Electro-magnetic Induction. |
| 00:52 | In this experiment, wires of 3000 turns coil are connected to ground (GND) and A1. |
| 01:00 | To show the magnetic effect, a magnet with 5mm diameter and 10mm length is used.
This is the circuit diagram. |
| 01:11 | Let's see the result on the Plot window. |
| 01:15 | A horizontal trace appears on the Plot window. Roll a paper and insert it inside the coil. |
| 01:23 | Drop the magnet inside the rolled paper and move it up and down. |
| 01:29 | Repeat the process until the induced voltage is captured and displayed. |
| 01:35 | On the Plot window, click on Experiments button. |
| 01:39 | Select Experiment list appears. Click on EM Induction. |
| 01:46 | Two new windows- Electromagnetic Induction and Schematic appear.
Schematic window shows the circuit diagram. |
| 01:56 | On the Electromagnetic Induction window, click on Start Scanning button. Horizontal trace changes to a wave. |
| 02:05 | It happens when the periodic scanning of the voltage coincides with the movement of the magnet. |
| 02:12 | This indicates voltage is induced in the coil by a moving magnet. |
| 02:18 | Next, I will demonstrate mutual induction of two coils. |
| 02:23 | In this experiment, A2 is connected to SINE. SINE is connected to ground(GND) through a coil. |
| 02:31 | And A1 is connected to ground (GND) through a coil. This is the circuit diagram. |
| 02:37 | Let's see the result on the Plot window. |
| 02:40 | Click on A1 and drag to CH1. A1 is assigned to CH1. |
| 02:47 | Click on A2 and drag to CH2. A2 is assigned to CH2. |
| 02:55 | Move the msec/div slider to view the applied waveform and induced waveform. |
| 03:02 | A changing magnetic field causes induced voltage. You may not see any induced voltage on the secondary coil. |
| 03:12 | Keep the coils close to each other along the axis. Insert some ferromagnetic material along the axis. |
| 03:20 | We have inserted a screw driver to induce voltage on the secondary coil. |
| 03:26 | Click and drag CH1 to FIT. Click and drag CH2 to FIT. |
| 03:34 | Voltage and frequency of A1 and A2 is seen on the right.
Difference in the voltages of A1 and A2 is due to the induced voltage on the secondary coil. |
| 03:47 | Next, we will demonstrate voltage induced by a rotating magnet using DC motor and coils. |
| 03:56 | In this experiment,
A1 is connected to ground(GND) through a coil. SQR2 is connected to ground(GND) through a DC motor. |
| 04:06 | A permanent magnet of 10mm diameter and 10mm length is mounted on DC motor.
A2 is connected to ground(GND) through a coil. |
| 04:18 | This is the circuit diagram. |
| 04:20 | Let's see the result on the Plot window. |
| 04:23 | Under Setting Square waves, set the frequency value to 100Hz. Click on SQR2 check-box. |
| 04:34 | Click on A1 and drag to CH1. A1 is assigned to CH1. |
| 04:41 | Click on A2 and drag to CH2. A2 is assigned to CH2. |
| 04:47 | Move the msec/div slider to obtain the wave form.
Move the volt/div slider to adjust the wave form. |
| 04:57 | Click on CH1 and drag to FIT.
Click on CH2 and drag to FIT. |
| 05:05 | On the right side, you can see voltage and frequency. Please note, voltage and frequency values of the two alternating waveforms are almost the same. |
| 05:16 | This is because, as the magnet rotates, magnetic field around the coil constantly changes between the poles. |
| 05:24 | Rotation of the magnet results in alternating induced emf in the coil. |
| 05:31 | Next, let's experiment with driven pendulum. |
| 05:34 | If a pendulum oscillates with an induced magnetic field, it is called a driven pendulum. |
| 05:41 | In this experiment, SQR1 is connected to Ground (GND) using a coil. |
| 05:47 | Button magnets are suspended in front of the coil with a paper strip as a pendulum. This is the circuit diagram. |
| 05:58 | Let's see the result on the Plot window. |
| 06:01 | click on SQR1 check box. |
| 06:05 | Click on Experiments button. Select Experiment list appears. Select Driven Pendulum. |
| 06:15 | Two windows appear-
Schematic of Driven Pendulum and EYES Junior: Driven Pendulum. |
| 06:23 | On the EYES Junior: Driven Pendulum window, drag the slider. As we drag the slider, the pendulum oscillates. |
| 06:33 | Between "2.6 Hz" to "2.9Hz" pendulum oscillates with a maximum amplitude.
This is because, its resonant frequency is same as its natural frequency. |
| 06:47 | Let's summarize. |
| 06:49 | In this tutorial, we have learnt to demonstrate:
and show circuit diagrams for our experiments. |
| 07:09 | As an assignment, demonstrate:
|
| 07:22 | This video summarizes the Spoken Tutorial project.
If you do not have good bandwidth, you can download and watch it. |
| 07:30 | We conduct workshops using Spoken Tutorials and give certificates. Please contact us. |
| 07:37 | The Spoken Tutorial Project is funded by NMEICT, MHRD, Government of India. |
| 07:44 | This tutorial is contributed by Kaushik Datta and Madhuri Ganapathi.
Thank you for joining. |
