pls tell answer of these three questions
thank u
Answers
Answer:
a-usually Copper and Aluminium wires are employed for Electricity Transmission because they have very low Resistivity and because of low resistivity it decreases the rate of resistance from which it will increase the amount of current flowing through the conductor, hence they are good conductors of electricity.
b- The resistance of a wire is directly proportional to its length and inversely proportional to its cross-sectional area. Resistance also depends on the material of the conductor. ... The resistance of a conductor, or circuit element, generally increases with increasing temperature
c- Tungsten metal is used exclusively for making the filament of electric bulbs because it has a very high melting point. Due to its high melting point, the tungsten filament can be kept white hot without melting away
Hope it will help you..