1. Write down the difference between conductors and insulators with examples. (2)
2. Draw the diagram of an electric torch with labelling. (5)
3. Why electricians should use rubber gloves during an electrical repairing work? (2)
4. The handles of the tools like screwdrivers and pliers used by electricians for repair work
usually have plastic or rubber covers on them. Can you explain why? (2)
Answers
Answer:
1. The conductor and insulator are the types of material. One of the major difference between the conductor and insulator is that the conductor allows the energy (i.e., current or heat ) to pass through it, whereas the insulator does not allow the energy to pass through it.
3. As rubber is a bad conductor of electricity so it does not allow the electric current to pass through it. Thus, the rubber gloves will save the electrician from any electric shock while repairing an electric switch or appliance.
4. Plastic or rubber is an insulator which does not allow electric current to pass through it. The handles of the tools like screwdrivers and pliers used by electricians for repair have covering of plastic or rubber so that electric current may not pass through these tools to the body of the electrician to harm him.
5. They do not allow current to pass through them. The handles of tools like screwdrivers and pliers used by electricians for repair work usually have plastic or rubber cover on them so that they do allow the current to pass through them and save the electrician from any electric shock.
Explanation:
2.
