With ece hw?

1a)the concept \voltage" can be explained in di erent ways. write down
your explanations in more than one way.
b) how would you explain the concept \electric current" through a conduct-
ing material, say, a wire?

c)explain the concepts of resistance and conductance.
d) is the resistance of a conducting material constant? or does it change
under di erent conditions? what are the conditions with which the resis-
tance of a conductor varies?
3. explain the concepts of resistance and conductance.