Question

explain an electroscope and earthing

Answer 1

An electroscope is a charge-detecting device which depicts the presence of a charge on the apparatus itself or upon other objects in the nearby vicinity. The presence of a charge on an electroscope is depicted by the deflection of its needle from its usual upright position. The needle, being free to rotate about its pivot, will be deflected whenever the charge in the needle is the same as the charge in the upright support upon which it balances. 


The connection between electrical appliances and devices with the earth plate or electrode through a thick wire of low resistance to provide safety is known as ‘Earthing’ or Grounding.