The author’s physical condition in Darchen.

State the physical condition in which Ohm.s law is not valid for a conductor.

What is resistivity of a wire ? What are the physical conditions on which resistivity of a metal depends ?

The author was disappointed with Darchen.

The physical and biological conditions in which an organism lives is its ______.

The author’s experience at Hor was in stark contrast to earlier accounts of the place.