application of electroscope in daily life
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It is a great, high impedance (nearly infinite) way to measure high voltage. You'll need to have a lower impedance voltage source and accurate voltmeter to calibrate it, however. It won't be linear, being more sensitive at lower voltages, but that is not a band thing for an analog meter.
It is a way to illustrate to students or coworkers who don't follow proper ESD procedures how pervasive static electricity is. Build one that is highly sensitive and have them touch it after doing a variety of things, and observe the voltage generated.
Clothes can affect this greatly. Natural fibers are less likely to generate a static charge than polyester or rayon. Fabric softener and dryer sheets reduce static by making your clothes slightly conductive. Shoes can have a huge effect by insulating you from the floor and triboelectricity with the floor.
You can demonstrate charging by induction with an electroscope. Put a metal globe on top of the electroscope. Place a charged object near the globe but not close enough to transfer charge. Observe that the electroscope indicates voltage even though you've not transferred charge.
Move the charged object away, if you've managed to keep the charged object from transferring charge then the electroscope will collapse again.
Do this again, but this time before moving the charged object away, ground the side of the globe opposite the charged object. The electroscope should collapse. Remove the ground, then move the charged object away.
The electroscope indicates voltage again! This is because the charged object simply moved charges around in the globe. But when you grounded the opposite side of the metal globe, you got rid of the excess charges on that side of the globe, leaving an overall charge on the globe.
In this way you can use a negatively charged object to induce a positive charge on another object, or vice-versa.
Hope it helps you ......................
It is a great, high impedance (nearly infinite) way to measure high voltage. You'll need to have a lower impedance voltage source and accurate voltmeter to calibrate it, however. It won't be linear, being more sensitive at lower voltages, but that is not a band thing for an analog meter.
It is a way to illustrate to students or coworkers who don't follow proper ESD procedures how pervasive static electricity is. Build one that is highly sensitive and have them touch it after doing a variety of things, and observe the voltage generated.
Clothes can affect this greatly. Natural fibers are less likely to generate a static charge than polyester or rayon. Fabric softener and dryer sheets reduce static by making your clothes slightly conductive. Shoes can have a huge effect by insulating you from the floor and triboelectricity with the floor.
You can demonstrate charging by induction with an electroscope. Put a metal globe on top of the electroscope. Place a charged object near the globe but not close enough to transfer charge. Observe that the electroscope indicates voltage even though you've not transferred charge.
Move the charged object away, if you've managed to keep the charged object from transferring charge then the electroscope will collapse again.
Do this again, but this time before moving the charged object away, ground the side of the globe opposite the charged object. The electroscope should collapse. Remove the ground, then move the charged object away.
The electroscope indicates voltage again! This is because the charged object simply moved charges around in the globe. But when you grounded the opposite side of the metal globe, you got rid of the excess charges on that side of the globe, leaving an overall charge on the globe.
In this way you can use a negatively charged object to induce a positive charge on another object, or vice-versa.
Hope it helps you ......................
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