Question

two wires P and Q made up of different materials have some resistance at room temperature when heated resistance of P increases and that of cube decreases what it includes..?​

Answer 1

❤gm ❤

P = conductor

Q= semiconductor

resistance of a conductor increases with increase in temperature and resistance of semiconductor decreases with increase in temperature .

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Answer 2

We know that..

$\rho \: \alpha \: \dfrac{1}{d} \: \alpha \: {A}^{2} \: \alpha \:T$

Here ..

$\rho$ = Resistivity

$\alpha$ = Proportionality sign (directly proportional)

A = Amplitude

T = Temperature

We also know that

R $\alpha$ $\dfrac{1}{\rho}$

Here..

R = Resistance

So,

$\dfrac{1}{R}$ $\alpha$ T

According to question we have P = conductor and Q = insulator.

As resistance of conductors increases with increase in temperature where resistance of insulators decreases with increase in temperature.

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