Give reasons:
a. Electrical wires are usually made of copper.
b. The doctor puts the injured area of the bone in a cast or plaster.
c. We should wear rubber soled shoes or slippers while operating electrical appliances.
Answers
Answer:
a)Copper electrical wires are safer to use than wires made of most other conductive metals because they are resistant to heat. As you can see, copper is the preferred metal for electrical wires for several reasons. It has high electrical conductive; it's inexpensive; it's ductile; and it's thermal resistant.
b)The function of a cast is to rigidly protect and immobilize an injured bone or joint. ...
Casts may also be used to help rest a bone or joint to relieve pain that is caused by moving it (such as when a severe sprain occurs, but no broken bones
c)While handling electrical gadgets, we are advised to wear rubber footwear as rubber is a bad conductor of electricity and prevents a large current from passing through the body... rubber-soled shoes do indeed provide some electrical insulation to help protect someone from conducting shock current through their feet
a.➜ Wires are usually made of copper because it has high conductivity.
It's inexpensive.
It has high ductility.
It is Thermal resistant.
b.➜ Casts and splints are orthopedic devices that are used to protect and support fractured or injured bones and joints. They help to immobilize the injured limb to keep the bone in place until it fully heals. Casts are often made from fiberglass or plaster.
c.➜ Rubber is a good insulator of electricity and prevent large electric currents to go through body,so they don't get shock and also helps reduce the risk of electric shock, if you touch a live wire it has no where to go.