PDF chapter test TRY NOW

What is electroscope? Explain how it works.
 
a. Electroscope is a device, which is used to detect the presence of  .
 
b. The leaf in the electroscope is made up of .
 
c. It operates on the idea  repels each other.
 
d. Induction is the process of charging an  body by bringing a charged body close to it but not touching it.