On the vehicle must be equipped with a series of electricity. As in the starter system, ignition systems, lighting systems, charging systems, and others. To be able to study electrical systems needed basic knowledge about electric current, voltage, resistance. Material on the understanding of electric current direction and back and forth, voltage, prisoners actually been studied in junior high school, but in SMK this material is still taught especially related to Automotive world because this is base before studying automotive electricity.
In this article Master Automotive will discuss the understanding of electric current, voltage, resistance and also the understanding of electric current direction and back and for example in the automotive field.
The concept of electric current, voltage, and resistance can be likened to both containers containing water connected by a narrowed pipe to impede the flow, as shown below.
Electrical voltage
Voltage or voltage can be likened to the height difference between the two containers above causing the flow of water, the greater the height of the water the stronger the flowing water. So that the electric voltage is a boost (power) is given to allow the flow of electric current. There are two kinds of voltage.
- Direct or DC electric voltage, this allows electricity to flow in only one direction and the amount of current flowing is constant or constant.
- This alternating AC or AC voltage allows electricity to flow in both directions at each cycle, the amount of current flowing varies per periodic.
Electric current
An electric current is represented as the amount or volume of water flowing every second. So the electric current is the number of electrons that flow every second in a conductor. The number of electrons flowing is influenced by the impulses given to the electrons, and also the condition of the "path" or the media through which the electrons pass. The electric current is given the symbol i with units called amperes.
Obstacles (Resistance)
Resistance or Resistance is thought to be the obstacle facing water as it flows in the pipeline, the bigger the pipe the smaller the water resistance. While the smaller the pipe the greater the obstacle. Then the obstacle here is anything that inhibits the alliran of litric currents and can affect the amount of current flowing.
Resistance on wire, motorcycle frame, body cable, and other values are pressed as small as possible so that the electric current flowing into strong and optimize the work of electrical components. Resistor type there are two kinds, namely fixed resistor or fixed resistor and variable resistor or variable resistor.