Demo 23 - an electrometer. The reading is high 3. We spoon...

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The electric field inside a Faraday cage is zero The radio cannot receive the electromagnetic waves emitted by the radio stations when it is placed inside Faraday’s cage. Faraday’s cage Faraday’s cage radio
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A fluorescent lamp emits light when we approach with a Tesla coil. The strong electric field at the coil tip excites the gas inside the lamp When the fluorescent lamp is now placed inside the Faraday cage the lamp is shielded from the coil’s strong electric field. The lamp does not emit light no matter how close we bring the coil tip Tesla coil Tesla coil Faraday’s cage Faraday’s cage
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1. We charge a metal can using a 5000 volts power supply. The strong electric field at the coil spays charge on the can 2. We “spoon” charge from the outside of the can using an insulated disc. We measure the spooned charge using
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Unformatted text preview: an electrometer. The reading is high 3. We spoon charge from the inside of the can using an insulated disc. We measure the spooned charge using an electrometer. The reading is now low + + + + + + 5000 volts power supply to ground +-+ + + + + + + + electrometer to ground +-+ + + + + + 5000 volts power supply to ground +-electrometer + + Tesla coil Fig.b + + + + + Fig.a Tesla coil Faradays cage Electroscope Faradays experiment: Fig.a: An electroscope outside the cage can be charged using a tesla coil. Fig.b: If the electroscope is placed inside the Faraday cage the tesla coil cannot charge it even though there is quite a bit of sparking from the tesla coil to the top plate. The electric field inside the cage is always zero...
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Demo 23 - an electrometer. The reading is high 3. We spoon...

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