Q.3 Which are the metals that are generally used: (i) In electric circuits (ii) As transmission lines.
Q.4 What is resistance? Describe on which factors resistance depends?
Answers
Hey Mate , here's your answer
Q3.(i) Silver,copper,etc.
(ii) Copper and Aluminium.
Q4.The electrical resistance of an object is a measure of its opposition to the flow of electric current. The inverse quantity is electrical conductance, and is the ease with which an electric current passes. Electrical resistance shares some conceptual parallels with the notion of mechanical friction.
Resistance of a conductor depends on :
1. Length of the conductor (more the length, more the resistance)
2. Cross-sectional area of conductor (more the cross sectional area, less is the resistance)
3. Temperature of conductor (more the temperature, more is the resistance as conductors generally have positive temperature coefficient)
4. Nature of material of the conductor.
in electric circuit copper wire are used
which resistance are you telling there are many type of register