## 21. Find the Thevenin equivalent (V_{TH} and RTH) between terminals A and B of the circuit given.

_{TH}and RTH) between terminals A and B of the circuit given.

21.

Find the Thevenin equivalent (V_{TH} and RTH) between terminals A and B of the circuit given.

22.

In a two-source circuit, one source acting alone produces 12 mA through a given branch. The other source acting alone produces 10 mA in the opposite direction through the same branch. The actual current through the branch is

23.

An ideal current source has zero internal resistance.

24.

A practical voltage source has a nonzero internal resistance.

25.

An ideal voltage source has zero internal resistance.