If you were to plot the voltage vs. the current for a given circuit, what would you expect the
slope of the line to be? If now the resistance of the circuit were a function of temperature would you still expect to see a straight line when plotting V vs. I, if the temperature was allowed to vary?

Explanation:

For a circuit containing ohmic conductors , the slope represents resistance of the circuit . It is so because according to ohm's law , ratio of voltage and current is constant or

V / I = R ( constant ) , V is voltage , I is current and R is resistance.

V = R I

It is similar to equation of a line in coordinate geometry

y = m x , m is slope of straight line.

In case of circuit containing non ohmic conductors , line will not be a straight line . It will be an upward sloping curve . It happens because of varying resistance at all value of potential . The slope at each point on the curve gives the value of instantaneous resistance .

When temperature changes , resistance too changes so even in case of ohmic conductors , slope changes as temperature changes . For a particular temperature , graph will be straight line.

iron would move it is magnetic there is a mag field around the current in the wire

the skeletons of most mammals reach a certain size and then stop growing. however, many animals, including some mammals, keep growing throughout their lives. kangaroos, for example, just keep growing and growing until they die. also, the longer an animal lives the greater the chance it might catch some deadly disease.