What is the materials which disobeys ohm's law?
Materials whose resistance changes with temperature increase or decrease. Ohm's law is not temperature dependent. An example is tungsten. It's resistance changes with temperature
They are called Non ohmic devices, for instance semiconductors devices don't follow ohm's law. They have a non linear relation between current and voltage.
the resistors which obeys ohms law are called as ohmic resistors and which doesn't follow the ohms law are simply refereed as non ohmic resistors.. for them value of current flow is proportional to voltage but not throughout the whole domain. that means for then resistance changes with the change in value of voltage applied... for instance semiconductors are the best example
Thanks! What is a GaA?
GaA?? could be a lot of things... Maybe it's in thist list? http://en.wikipedia.org/wiki/GAA
Actually GaA is some material which does not obey ohm's law. the material exhibits more tha one value of V for the same current I
GaAs is a semi conductor