The source that is most often used today is a dry cell, or battery.Chemical reaction inside the battery produce charges that will later be used as heat/light energy in a load.
Current (I) measured in Amperes represent the number of electrons passing through a certain point in the circuit for a given unit of time.
I = Q/t Where Q is the symbol for charge measured in Coulombs.
It is important to understand the conventional current as thought by Benjamin Franklin, is the measurement of protons in a circuit. However, as we became more knowledgeably we discovered that it was actually the electrons(-) that are passing through, we call this electron flow.
As electrons passes through a source, it gains potential energy, which will later be transformed into heat/light energy. This energy can be also called electric potential difference which we commonly refer to as Voltage (V) measured in Volts.
V = E/Q where E is the symbol for energy (work) measured in Joules.
The voltage can be measured with a ammeter shown below.
No comments:
Post a Comment