Thermal resistance and resistivity.

Define resistivity.

The lengths,resistances and resistivities of materials of two wires-each is in the ratio of 1:2 What is the ratio between their diameters?

What is thermal resistance? Write dimensional formula of thermal resistance.

The width and the cross-section of a conductor remaining unchanged, what is the relation between the thermal resistance and thermal conductivity of that conductor?

The length,radius and resistivity of two wires are each in the ratio 1:3. The resistance of the comparatively thin wire is 20 Omega . Determine the resistance of the other wire.

for two different wires-the length, radius and resistivity are in the ratio 2 : 1 . If one of then has resistance of 10Omega , What will be the resistance of the other?

The environmental resistance means

Construct an equation for thermal resistance when length, cross setion and thermal conductivity are l,A and K respectively.

The equivalent resistance of two resistances in series is four times the equivalent resistance when they are in parallel. If one of the resistances is R, then what would be the resistance of the other?