Suggested Answer
Potential difference between the ends of a circuit. Electrons flow from high potential to low potential.
Suggested Answer
If the two requirements
of an electric circuit are met, then charge will flow through the external circuit. It is said
that there is a current - a flow of charge. Using the word current
in this context is to simply use it to say that something is happening
in the wires - charge is moving. Yet current is a physical quantity that
can be measured and expressed numerically. As a physical quantity, current
is the rate at which charge flows past a point on a circuit. As
depicted in the diagram below, the current in a circuit can be
determined if the quantity of charge Q passing through a cross section of a wire in a time t can be measured. The current is simply the ratio of the quantity of charge and time.
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