A practical current source consists of a 2-mA ideal current source in parallel with a 500- resistance.

A practical current source consists of a 2-mA ideal current source in parallel with a 500-Ω

resistance.

(a) Find the equivalent practical voltage source. Then (b), connect a 1-kΩ resistor in parallel with the first and find the power delivered by the current source. Finally

(c), find the power delivered by the equivalent voltage source. Why the difference?