What is an electroscope? Name two type of electroscope.
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Answer:
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Explanation:
An electroscope is a scientific device that is used to detect the presence of an electric charge on a body. In the year 1600, British physician William Gilbert invented the first electroscope with a pivoted needle called versorium.
Electroscope detects the charge based on the Coulomb electrostatic force which causes the motion of test charge. Electroscope can be regarded as a crude voltmeter as the electric charge of an object is equal to its capacitance. An instrument that is used to measure the charge quantitatively is known as an electrometer.
Types of electroscope
There are two classical types of electroscopes and they are as follows:
Pith-ball electroscope: Pith-ball electroscope was invented by John Canton in the year 1754. It consists of one or two small light balls that are a lightweight non-conductive substance called pith. In order to find if the object is charged or not, it is brought near uncharged pith ball. If the ball gets attracted towards the object it means the object is charged
Gold-leaf electroscope: Gold-leaf electroscope was developed by Abraham Bennet in the year 1787, which is more sensitive than pith-ball electroscope. It consists of a vertical metal rod which has two parallel strips of thin flexible gold leaf hang to it. To prevent the gold leaf from drafts of air, it is kept in a glass bottle. The gold leaves spread apart into inverted “V” when a charged object is brought near to it.
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Answer:
A Device Which is used to Test Whether An Object Is Carrying Charge or Not is called Electroscope.
They are Two types of Electroscope:-
1)Pithball Electroscope
2)Gold Leaf Electroscope