why are there two metallic plates attached to the bell Jar of an electroscope
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the two metallic plates attached to the bell jar of an electroscope to show that the object is charged or not. If the object is charged the metallic plate repel each other and thus diverg
The two metallic plates attached to an electroscope's bell jar are part of a "gold-leaf electroscope," which is used to detect and measure the presence of electric charges. The purpose of the metallic plates is to create a shielded environment inside the electroscope, where the gold leaf can be protected from external electric fields that might interfere with the measurement of charges.
One of the metallic plates is attached to the bell jar, while the other plate is connected to a metal rod inside the electroscope. The metal rod is attached to the gold leaf, which is suspended between the two plates. When a charged object is brought near the electroscope, the charges induce a separation of charges in the metal rod and the gold leaf, causing the gold leaf to move. By measuring the angle of deflection of the gold leaf, the strength and polarity of the charge can be determined.
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