Long Answer Questions
1. Why should an electrician use a screw driver with a plastic or wooden handle while carrying out
repairs?
2. What does an electric circuit consist of? Draw an electric circuit and explain its working.
3. Describe a simple experiment to test whether a given material is a conductor or an insulator.
Answers
Answer:
1. It is because plastic and wood are insulators of heat and electricity. ... Thus, they prevent the electrician from catching fire or getting a electric shock.
2.An electrical circuit is composed of a source of electrical power, two wires that can carry electric current, and a light bulb. One end of both the wires is attached to the terminal of a cell whiletheir free ends are connected to the light bulb. The electrical circuit is broken when the bulb is switched off.
3.Touch the open ends of the two wires to each other to form a circuit and test the bulb. Touch the two open ends of the wire to each material you are testing, one at a time. If the bulb lights up, it is a good conductor. If it doesn't, it is a goodinsulator.
Explanation:
Answer 1:- It is because plastic and wood are insulators of heat and electricity. ... Thus, they prevent the electrician from catching fire or getting a electric shock.
Answer 2:- An electrical circuit is composed of a source of electrical power, two wires that can carry electric current, and a light bulb. One end of both the wires is attached to the terminal of a cell while their free ends are connected to the light bulb. The electrical circuit is broken when the bulb is switched off.
Answer 3:- Touch the open ends of the two wires to each other to form a circuit and test the bulb. Touch the two open ends of the wire to each material you are testing, one at a time. If the bulb lights up, it is a good conductor. If it doesn't, it is a good insulator.