Question

direction of current througha circuit may be changed using​

Answer 1

Answer:

Two ways at least. First, a switch might be thrown, creating another path for current to flow down. Second, the driving voltage itself might be reversed, as happens in AC (the electricity in your house does this.) In the first case the “switch” might actually be a transistor, and the state change might occur because a capacitor reached a high enough voltage to trigger current flow in the transistor. This is how you can get oscillators, with two transistors and two capacitors. I don't follow all the details myself, but that’s the gist.

Answer 2

Answer:

The direction of an electric current is by convention the direction in which a positive charge would move. Thus, the current in the external circuit is directed away from the positive terminal and toward the negative terminal of the battery. Electrons would actually move through the wires in the opposite direction.

Explanation:

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