Basic Ohm’s Law Principle
Computers & Technology → Technology
- Author Maikel Michiels
- Published December 29, 2012
- Word count 496
The mathematical relationship among voltage, current and resistance explains more than you think of electricity and that’s thanks to Ohm’s Law. A guy named George Ohm released this formula in 1827 based on his trials with electricity. Resistance, current and voltage can all be identified through the formula which are essential for designing circuits. Whenever you plan to design a circuit, Ohm's law could be used to establish the correct voltage, resistance or current values. This allows to pick for example the right resistor for a particular situation. Ohm's law may for instance be used to figure out the required voltage in case the resistance and desired current inside of a circuit are known.
First let's take a look at the main factors we require to analyze a circuit. The steady motion of free electrons via the conductors of a electrical circuit is called a current (I), and it is described as "flow," similar to the flow of a liquid through a pipe.The pressure stimulating electrons in order to "flow" inside a circuit is termed voltage(V). Voltage is a specific measure of potential energy which is always relative between 2 points. The hydraulic comparison for voltage is pressure.Without reference to two distinct points, the definition of "voltage" has no significance. Free electrons usually move through conductors with some level of friction, or opposition to motion. This opposition to motion is more correctly named resistance (R).
In mathematical term, we are able to say that V = I x R defines Ohm’s Law. With V, I and R which represents voltage, current value and resistance respectively. The formula may be written as I = V / R and R = V / I depending on what value you need to get.
If you'd like to determine the amount of electrical current, divide voltage by resistance as described in this formulation, I = V / R. Current and voltage are directly proportional to each other whereas resistance is the contrary. If the amount of resistance is constant, a rise in voltage is going to have the same impact on current. At the same time, when the resistance in a circuit rise and then the voltage doesn't change, the current will certainly decrease.
So long as you have resistance and current, you can identify voltage easily using the the formula V = I x R. Regardless of what, provided that the current keeps constant, voltage will increase should the resistance increases.
The resistance present in a circuit can be calculated with R = V / I. The formulation suggests that with current remaining the same, there is higher resistance if the voltage is increased. Lowering resistance happens when electric current is intensifying and voltage is steady. It needs to be taking into consideration that most resistors possess a fixed resistance value, independent of voltage level or current. However semiconductors may have a varying resistance.
To conclude, electrical circuits may be dissected with regards to the relationship between its key elements - voltage, resistance and current.
We from the Resistor Guide are here to help people understand the importance of knowing how to safely use electricity and how to use resistors. If you want to know more about us please visit us at: http://www.resistorguide.com/ohms-law/
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