Question

if the bulb if an electric tester does not lights up at all then the given material is a​

Answer 1

Answer:

An insulating material

Answer 2

Answer:

To test whether a given object is a conductor or an insulator we connect the two ends of that object to A and B. If after connecting the object between AB, the bulb lights up, the object is a conductor and if bulb does not light up, the object is an insulator.