Temperature Dependence of Resistivity

The conductivity of a material varies with temperature for (i) semiconductors and (ii) good conductors as

Material that is widely used to make wire bound standard resistors is

The INCORRECT statement is

Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Alloys such as constantan and manganin are used in making standard resistance coils.

Reason R: Constantan and manganin have very small value of temperature coefficient of resistance.

In the light of the above statements, choose the correct answer from the options given below.

Resistance of the wire is measured as $2 \mathrm{\Omega }$ and $3 \mathrm{\Omega }$ at $10°\mathrm{C}$ and $30°\mathrm{C}$ respectively. Temperature coefficient of resistance of the material of the wire is

How resistivity varies with temperature for semiconductor insulator and conductor?

Do insulators have resistivity?

What is the effect of temperature on the resistivity of a conductor?

How does resistivity of insulators relate to temperature?

The positive temperature coefficient of resistance is for;

Give an example of a material each for which temperature coefficient of resistivity is (1) positive (2) Negative

Why temperature coefficient of resistance of conductor is positive?

The temperature dependence of resistance of $\mathrm{Cu}$ and undoped $\mathrm{Si}$ in the temperature range $300-400 \mathrm{K}$ is best described by

The temperature coefficient of resistance of a wire is $0.00125 /°\mathrm{C}$ . At $300 \mathrm{K}$, its resistance is $1 \mathrm{\Omega }$. The resistance of wire will be $2 \mathrm{\Omega }$ at

Consider the statements A and B in the previous question. Peltier effect is caused

A conducting resistance is connected to a battery. The temperature of the conductor decreases due to cooling. The current flowing through the resistance will -

Nichrome or Manganin are widely used in a rheostat because of their,

A piece of Gold (Au) and Germanium (Ge) are cooled from room temperature to 77 K. Then the resistance of

A sliver wire has a resistance of $2.1 \mathrm{\Omega }$ at $27.5{}^o\mathrm{C}$ and a resistance of $2.7\mathrm{\Omega }$ at ${100 }^o\mathrm{C}.$ Determine the temperature coefficient of resistivity of silver.

The temperature coefficient of resistance of a manganin wire is $0.002$ per degree centigrade and its resistance is $7.6 \mathrm{o}\mathrm{h}\mathrm{m}$ at $300 \mathrm{K}.$ When a potential is applied, its temperature increases to ${77 }^o\mathrm{C}.$ Now what will be its resistance?