Sketch of a graph showing variation of resistivity of carbon with temperature?

Show on graph, the variation of resistivity with temperature for a tyical semiconductor.

Sketch a graph showing the variation of inductive reactance with frequency o the applied voltage.

Explain with the help of a graph, the variation of conductivity with temperature for a metallic conductor?

Plot a graph showing variation of activity of a given radioactive sample with time.

Sketch a graphs showing the variation of stopping potential with frequency of incident radiations for two photosensitive materials A and B having threshold frequencies v_0>v_0' respectively? What information do you get from the slope of the graphs?

Sketch a graphs showing the variation of stopping potential with frequency of incident radiations for two photosensitive materials A and B having threshold frequencies v_0>v_0' respectively? What does the value of the intercept of graph'A' on the potential axis represent?

Define resistivity of a conductor. Explain the variation of resistance with temperature in semiconductors.