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In this program you will be looking at the factors that affect the magnetic field around a wire. The magnetic field from the Earth has been shielded for this lab. You will be able to change the strength and direction of the current (moving electrons) and you will be able to measure the the location of the magnetic field probe relative to the center of the wire.

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These demonstrations about laws and tools associated with electricity and magnetism allow you to adjust variables at and to visualize invisible forces - which makes them almost better than the real thing.

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These demonstrations about laws and tools associated with electricity and magnetism allow you to adjust variables at and to visualize invisible forces - which makes them almost better than the real thing.

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When you rub the foam plate with a wool cloth, you charge it negatively. That's because the foam attracts electrons from the cloth. Often, a plate fresh from the package will start with a positive charge. If it does, you will have to rub the plate long enough to cancel this initial charge before you can begin building a sizable negative charge. By using an electroscope (such as the one you can build with our Electroscope activity), you can determine whether the foam is positively or negatively charged. Plastic foam or Styrofoam is an insulator; it will hold its charge until it is discharged by current leaking into the air or along a moisture film on its surface.

When you place the pie pan on the foam plate, the electrons on the foam repel the electrons on the pan. Since the electrons can't leave the pie pan because it is completely surrounded by insulating air and foam, the pan remains neutral. If you touch the pie pan while it is near the foam plate, the mobile electrons will be pushed off the pan and onto you. The electrons make a spark as they jump a few millimeters through the air to reach your finger. The air in the spark is ionized as the moving electrons knock other electrons off air molecules. The ionized air emits light and sound. You can also feel the flow of electrons through your finger.

After the electrons leap to your finger, the pan has a positive charge. Physicists say the pan has been charged by induction. You can carry the positively charged pan around by its handle and carry the positive charge to other objects. For example, if you bring the positively charged pan near your finger again, or near any object that can be a source of electrons, the pan will attract electrons, creating a second spark.

When you touch a positively charged pie pan to the nail on the Leyden jar, electrons from the nail flow onto the pie pan. T he resulting positive charge on the nail attracts electrons from your body through your hand onto the aluminum foil of the jar. The Leyden jar will then have a positively charged center separated from the negative foil outside by the insulating plastic of the film can. If you touch one finger to the foil and bring another finger near the nail at the center of the Leyden jar, a spark will jump, as the negative charges are attracted through you to the positive nail.

The beauty of the Leyden jar is that it can store charges from several charged pie pans, thus building up to a larger, more visible, more powerful (and more painful) spark.

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Tired of electrostatic experiments that just won't work? This experiment will produce a spark that you can feel, see, and hear. Rub a foam plate with wool to give it a large electric charge, then use the charged foam to charge an aluminum pie pan.

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Go to Android Sensor Box and select  magnetic sensor module

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Go to Android Sensor Box and select  magnetic sensor module

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Step 1:Obtain and install the app on the smartphone.

Step2: Click on the magnet to open the magnetic sensor module.

Step3:Move the phone around the room or outside and watch how the readings change.  Move the phone near the magnet to see how it reacts.  Speakers and older phones are also great places to take a magnetic field reading.  The app reads magnetic fields in the unit Teslas, which is a SI unit for magnetic field.

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Sensor Box for Android - Apps on Google Play

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Sensor Box for Android detects all available sensors on your Android device, and vividly shows you how they work with amazing graphics. Sensor Box for Android also tells you which sensors are supported by the hardware, and provides extremely useful sensor tools that could be used in our daily life.Sensors included- Gyroscope SensorGyroscope sensor can measure six directions at a time.

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Link

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Edpuzzle assignment. Make video delivery an interactive experience. Students watch the lesson while answering the quizzes. The teacher gets the powerful hassle-free analytics.