Question

Give an activity to examine the behaviour of the following solid materials towards electricity: plastic, copper, rubber, wood, graphite.

Answer 1

• Take a torch bulb and connect its positive terminal to the positive terminal of the battery and negative terminal to the object to be tested.
• Connect the negative terminal of the battery to the object with a wire.
• Do not touch the object when the current is passing through it.
• If the bulb glows, then the material is conducting else not.

We see that graphite and copper conduct electricity whereas rubber, plastic and wood do not.