Ohms R is a measure of resistance and is analogous to the water pipe size. Current is proportional to the diameter of the pipe or the amount of water flowing at that pressure. Voltage is an expression of the available energy per unit charge which drives the electric current around a closed circuit in a direct current DC electrical circuit.
Increasing the resistance, comparable to decreasing the pipe size in the water circuit, will proportionately decrease the current, or water flow in the water circuit, which is driven through the circuit by the voltage, which is comparable to the hydraulic pressure in a water circuit. The relationship between voltage and current is defined in ohmic devices like resistors by Ohm's Law. Ohm's Law is analogous to the Hagen—Poiseuille equation, as both are linear models relating flux and potential in their respective systems.
Electric current I is a rate of flow and is measured in amps A. Ohms R is a measure of resistance and is comparable to the water pipe size.
An "amp", short for ampere, is a unit of electrical current which SI defines in terms of other base units by measuring the electromagnetic force between electrical conductors carrying electric current. A "watt" is a measure of power. Skip to content One of the major difference between the volt and amp is that the volt is the SI unit of the voltage, potential difference and electromotive force whereas the amp is the SI unit of the current.
Key Differences Between Volt and Amp. The volt measure the force which causes the electrons to flow through the conductor whereas the amp measure the rate of flow electrons. Volt is equal to the ratio of joule per coulomb whereas the amp is represented by the coulomb per second. The volt is represented by the symbol V and the ampere is represented by the symbol A. The volt is the unit of potential difference, voltage and electromotive force, whereas the amp is the unit of current.
It is measured in amperes. In the above picture you can see there smaller pipes connected to a larger pipe. As you know there should be sufficient pressure in the large pipe to lift water up the smaller pipe. Higher the pressure in the large pipe more water flows out through the smaller pipe.
In addition to, the diameter of smaller pipes also determines the water flow. Hope this analogy has made volts vs amps more clear to you. Volts represent the measure of potential difference between any two points in an electric field whereas ampere is the rate of current flow in a conductor or a circuit.
Hope that the above explanations and analogy has helped you understand the difference between volts and amps or ampere. Select personalised ads. Apply market research to generate audience insights. Measure content performance.
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