Copper : conductor : : Wood ________

The temperature at which normal conductor is converted into super conductors is _______

Assertion (A): Food can be cooked faster in copper bottom vessels Reason (R): Copper is the best conductor of heat.

Show variation of resistivity of (i) conductor (i.e. copper) (ii) semiconductor (sI) with temperature is a graph. Give reason.

(i) At what temperature would the resistance of copper conductor be double its resistance at 0^(@)C . (ii) Does this temperature hold for all copper conductors regardless of shape and size? Given alpha for Cu=3.9xx10^(-3)""^(@)C^(-1) .

What is the drift velocity of an electron in a copper conductor having area 10 xx 10^(-6) m^2 , carrying a current of 2A. Assume that there are 10 xx 10^(28) electrons/ m^3 .

Copper pyrite , copper glance and cuprite are ores of ____________.

Heart wood is also known as_______

Discuss the various properties of conductors in electrostatic equilibrium . Properties of conductors in electrostatic equilibrium:

{:("(i) Insulator","(a) Glass"),("(ii) Semiconductor","(b) Germanium"),("(iii) Conductor","(c ) Copper"),("(iv) Super conductor","(d) Mercury"):}