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Old 12-27-2014, 05:27 PM   #43
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Just to use a second source, that is consistent with my first source...much fun.

(Conventional flow is positive to negative, to make things easier for regular people to understand...the actual movement of electrons in a circuit is known as electron flow which is negative to positive)

From physics 4 kids
Physics4Kids.com: Electricity & Magnetism: Direct Current

"There are two main types of current in our world. One is direct current (DC) which is a constant stream of charges in one direction. The other is alternating current (AC) that is a stream of charges that reverses direction. Let's look at DC power which was refined by Thomas Edison in the 1800s.

The current in DC circuits is moving in a constant direction. The amount of current can change, but it will always flow from one point to another. Before we move on, we need to explain that physicists, as well as electricians, refer to something called conventional current.

Do you remember that we talked about physicists agreeing to always use positive charges to determine how electric field lines would be drawn? Following through on that agreement, they also agreed to explain charge flow in terms of positive charges rather than electrons. So although electrons would flow from negative to positive, by convention (agreement), physicists refer to conventional current as a flow from high potential/voltage (positive) to low potential/voltage (negative). Reminding you that potential is like electrical height, this means that conventional current flows "downhill", which makes sense.

Electrons move from areas where there are excess of negative charges to areas where there are a deficiency (or positive charge). Electrons move from "-" to "+", but conventional current is considered to move in the other direction. When you set up a circuit, conventional current is considered to move from the "+" to the "-" side.

The idea about using positive charges in forming explanations comes from Benjamin Franklin. In Franklin's day, we didn't know about protons and electrons. Franklin believed that something moved through electrical wires, and he called these things "charge". He assumed there was only one kind of charge, and he logically assumed that charge would flow from a spot that had an excess (extra), to a spot that had a deficiency (too few). He called the spot with an excess "positive" and the spot with a deficiency "negative". So, for Franklin, charge flowed from positive to negative. We simply honor his achievements by continuing with this idea. "
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Old 12-27-2014, 09:27 PM   #44
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Originally Posted by RodgerS View Post
By the by, and just for fun. Which way does current flow? Before you answer you may want to research this a bit....remember...curiosity killed the cat = the cat became lost in never ending research.

Start with this. Conventional versus electron flow : Basic Concepts Of Electricity - Electronics Textbook
Electrons flow out of the negative post of the battery and back into the positive post. Remember that electricity is the flow of electrons through the circuits. Electrons have a negative charge so they start at the negative terminal. Internally (inside the battery) the electricity flows from the positive terminal through the plates to the negative terminal.
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