Current Resistance Voltage
More specifically ohm s law defined that the current i through a conductor between two points is directly proportional to the voltage v.
Current resistance voltage. Just like voltage resistance is a quantity relative between two points. V v i a r ω. A potential difference voltage across an electrical component is needed to make a current flow through it. Where i is the current through the conductor in units of amperes v is the voltage measured across the conductor in.
Voltage is represented in equations and schematics by the letter v. In this analogy charge is represented by the water amount voltage is represented by the water pressure and current is represented by the water flow. The amount of current in a circuit depends on the amount of voltage and the amount of resistance in the circuit to oppose current flow. When describing voltage current and resistance a common analogy is a water tank.
The amount of resistance a resistor has is determined by the relationship of the current through it to the voltage across it which determines whether the circuit element is a good conductor low resistance or a bad conductor high resistance. Current voltage and resistance current is the rate of flow of electric charge. The power p in watts w is equal to the voltage v in volts v times the current i in amps a. For this reason the quantities of voltage and resistance are often stated as being between or across two points in a circuit.
This electronics video tutorial provides a basic introduction into voltage current and resistance. Introducing the constant of proportionality the resistance one arrives at the usual mathematical equation that describes this relationship. It is the most fundamental law that defines the relationship between the current i resistance r voltage v and power p. The voltage v in volts v is equal to the current i in amps a times the resistance r in ohms ω.
The unit of voltage is the volt which is a measure of el. Ohm s law states that the current through a conductor between two points is directly proportional to the voltage across the two points. A potential difference voltage across an electrical component is needed to make a current flow through it. A basic electrical engineering equation called ohm s law spells out how the three terms relate.