4. What is electrical resistivity? How does it vary on increasing the temperature of a conductor?
Answers
Answer:
The resistivity increases means that the conductivity of the material decreases. For metals or conductors, it is said that they have a positive temperature co – efficient. The value α is positive. For most of the metals, the resistivity increases linearly with increase in temperature for a range of 500K.
Answer:
Electrical resistivity (also called specific electrical resistance or volume resistivity) and its inverse, electrical conductivity, is a fundamental property of a material that quantifies how strongly it resists or conducts electric current. A low resistivity indicates a material that readily allows electric current. Resistivity is commonly represented by the Greek letter ρ (rho). The SI unit of electrical resistivity is the ohm-meter (Ω⋅m).
Explanation:If the temperature will be more so movement of atoms will be more thus Electrons carrying can easily pass through them if the heat is more the electrical resistivity become low