describe the work of electroscope
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Answer:
ELECTROSCOPE : Electroscope is used to detect and measure electric charges.
WORKING OF AN ELECTROSCOPE :
•In an uncharged electroscope, the leaves hang straight down.
•When a charged object touches the metal knob, electric charges travel down the rod and into the leaves.
•The leaves spread apart, indicating the presence of an electric charge.
•Since the charge on both leaves is the same the leaves repel each other and spread out.
CONSTRUCTION OF AN ELECTROSCOPE :
An electroscope consists of a metal rod with a knob at the top and a pair of thin metal leaves at the bottom. The rod is inserted in a one hole rubber stopper which fits into a flask.The flask contains the lower part of the rod and the metal leaves.
An electroscope is an early scientific instrument used to detect the presence of electric charge on a body. It detects charge by the movement of a test object due to the Coulomb electrostatic force on it. The amount of charge on an object is proportional to its voltage. The accumulation of enough charge to detect with an electroscope requires hundreds or thousands of volts, so electroscopes are used with high voltage sources such as static electricity and electrostatic machines. An electroscope can only give a rough indication of the quantity of charge; an instrument that measures electric charge quantitatively is called an electrometer.........