Physics
Write an expression connecting the resistance of a wire and specific resistance of it's material. State the meaning of symbols used.
Related Questions
The properties for which nichrome wire is used in heating appliances is/are :
- Specific resistance is high
- Resistance decreases with an increase in temperature
- Resistance increases with an increase in temperature
- Both (1) and (3)
A super conductor is a substance of :
- infinite conductance
- infinite resistance
- zero resistance
- both (1) and (3)
State the order of specific resistance of (i) a metal, (ii) a semiconductor and (iii) an insulator.
Name a substance of which the specific resistance remains almost unchanged by the increase in temperature.