What is the relationship between resistivity and/or conductivity and temperature?

The material that has the greatest resistivity is the metal because as temperature increases metals are more likely to increase in resistivity and semiconductors usually decrease in resistivity as temperature increase.

What is the effect on the product of resistivity and conductivity?

CONCEPT: Resistivity is an inverse of conductivity i.e. Hence the product of resistivity and conductivity of a metal is always constant (equal to 1).

What happens when temperature increases in conductor?

Answer: The resistance of a conductor increases with an increase in temperature because the thermal velocity of the free electrons increases as the temperature increases. If we raise the temperature of the metallic conductor, the resistance will increase.

What is the relationship of resistivity and conductivity?

Conductivity, σ is the reciprocal of the resistivity. That is 1/ρ and has the unit of siemens per metre, S/m. Conductivity ranges from zero (for a perfect insulator) to infinity (for a perfect conductor). Thus a super conductor has infinite conductance and virtually zero ohmic resistance.

Why does resistivity change with temperature?

Resistivity depends on the temperature of the material. In metal conductors, when the temperature increases, the ion cores in the metal vibrate with a larger amplitude. This hinders the flow of electrons, and the resistivity increases.

On which factors the resistivity of a conductor depends?

Note: The resistivity of a conductor depends only on the above mentioned three factors i.e., length, area of cross-section, and nature of the material of the conductor. Additionally, it also depends upon the physical conditions like temperature and pressure but is independent of its shape and size.

How does the resistivity of a conductor vary with temperature?

The resistivity of conductors increases with rise in temperature. As the temperature of the conductor increases, the average speed of the electrons acting as the current carriers increases. Since the resistivity is inversely proportional to the average time , therefore resistivity increases.

What is the effect of temperature on conductivity of conductor and semiconductor?

When a semiconductor is heated, the conductance increases and the resistance decreases. So when temperature increases, conductivity increases. When temperature decreases, conductivity of a semiconductor decreases.

How does the ratio of conductivity and resistivity change with increase in temperature?

Resistance of the conductor increases with increase in temperature whereas conductance of the conductor decreases with increase in the temperature. Thus ratio of conductivity and resistivity decreases with increase in temperature.

What happens to the resistance of a conducting wire at high temperature?

The resistance of a typical conducting wire is low when temperature is low and high when temperature is high. The increase in resistance alongside temperature is due to an increase in energy of the wire atoms, which cause them to vibrate more which starts to impede electron flow.

What is the relationship between cond condictivity and resistivity?

Condictivity is the inverse of resistivity… so I only need to answer one. In general, as the temperature increases, resistivity increases. Some semiconductors have a property that increasing temperature can decrease resistivity for a short while by releasing charge carriers (more charge carriers, more conduction).

How does temperature affect the conductance of a metallic conductor?

Resistance of a metallic conductor is increased by increasing temperature. Conductance is decreased by increasing temperature.