The aluminum strips in an electroscope as shown in fig. 15.1 are replaced by plastic strips and a charged body is brought in contact with the metal clip. What will happen?

If aluminum (metal) strips in an electroscope are replaced by plastic strips, the strips won’t spread out. As a result, we cannot test whether the object is carrying a charge or not.

Note: Electric charge can be transferred from a charged object to another only through a metal conductor.