How does the resistance depend upon the temperature?

What is mean free path of a gas molecule? Show that the mean free path is inversely proportional to the pressure of the gas. Does the mean free path depend upon the temperature of the gas?

How does adsorption of gases on solids depend upon: Temperature?

Which of the following oxides behaves as conductor or insulator depending upon temperature?

How does the resistance of an ohmic conductor depend upon the applied voltage?

How does induced e.m.f. depend upon the change in magnetic flux?