Draw the output characteristic curves of a n-p-n transistor in a CE configuration and find the output resistance from it.

Explanation

The figure shows for an n-p-n transistor in CE configuration the graphs of output current `"I"_(C)` with respect to output voltage `"V"_(CE)` when the base current `"I"_(B)` is kept fixed at different values. These are called output characteristic curves of n-p-n transistor. If two points A and B are taken on the same graph the change in collector current = `Delta I_(C)` for these two points.