Equation Of Ohms Law:
Ohm's law may sound a bit confusing when written in words, but it can be described by the simple formula:I=V/R
where I = current in amps, V = voltage in volts, and R = resistance in ohms.
This same formula can be also be written in order to calculate for the voltage or the resistance:
I=V/R OR V=IR OR R=V/I
Ohms Law Triangle:
If you ever need help in remembering the different equations for Ohm's law and solving for each variable (V, I, R) you can use the triangle below..jpg)
As you can see from the triangle and the equations above, voltage equals I times R, current (I) equals V over R, and resistance equals V over I.
Ohms Law Circuit Diagram:
Here is a diagram showing I, V, and R in a circuit. Any one of these can be calculated using Ohm's law if you know the values of the other two..png)
Explanation By Example:
Ohm's law describes the way current flows through a resistance when a different electric potential (voltage) is applied at each end of the resistance. One way to think of this is as water flowing through a pipe. The voltage is the water pressure, the current is the amount of water flowing through the pipe, and the resistance is the size of the pipe. More water will flow through the pipe (current) the more pressure is applied (voltage) and the bigger the pipe is (lower the resistance).NOTE: It is generally applied only to direct current (DC) circuits, not alternating current (AC) circuits. In AC circuits, because the current is constantly changing, other factors such as capacitance and inductance must be taken into account.
No comments:
Post a Comment