State one use of conductors and one of the insulators. Which of the following are conductors and which are insulators?
Key, Eraser, Plastic scale, Matchstick, Glass bangle, Iron nail
Important Questions on Electricity and Circuits
An electric circuit containing a dry cell and a torch bulb is completed by including a metal screwdriver having a wooden handle. Explain why the bulb would not glow.
Why is it advisable to operate electric switches with dry hands?
Why do electricians wear rubber hand gloves while working with electricity?
The handles of tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber covers on them. Can you explain why?
Explain why we should never join the two terminals of a cell directly by a wire only.
Name any five gadgets (or devices) which use electricity from cells or batteries for their working.
State any two uses of electricity.
