a) Give one example to show how the resistance depends on the nature of material of the conductor.
of the conductor ?
b) Calculate the resistance of an aluminium cable of length 10 km and diameter 2.0 mm if the resistivity of
aluminium is 2.7 x 10-8 S2m.
Answers
Answer:
1 Answer. (a) If we take two similar wires of same length and same diameter, one of copper metal and other of nichrome alloy, we will find that the resistance of nichrome wire is about 60 times more than that of the copper wire. This shows that the resistance depends on the nature of material of the conductor.
Explanation:
Electricity is one of the forms of energy which involves the flow of electrons. It is a basic part of nature and the most commonly used form of energy. The generation of electricity happens with the help of a device called an electric generator. When a current-carrying conductor moves across a magnetic field, an electric current generated in the conductor.
A magnet is used at the end of the rotating shaft which is placed within a stationary conducting ring which is a long and a continuous piece of wire. A small amount of electric current is induced through the conductor at different sections as the magnet keeps moving. All these small currents add up to one considerable amount of current which is known as electric power.