Ohm's Law is a law that is used in physics which basically
explains how electricity to operate well in a simple circuit. To explain the
process of electricity this law shows how the three elements of electricity -
amperage, resistance, and voltage - work together to create a functioning
electrical circuit.
According to
the ohm that the amount of electric current, measured in amperes, traveling
through a conductor is proportional or equal to the voltage, but inversely
proportional to the resistance of the conductor. Proponent of law and namesake
is George Simon Ohm, a German physicist famous in the early 1800s. While
working as a professor at the Jesuit Gymnasium of Cologne in Germany, he
experimented with and observing the behavior of simple electrical circuits with
different wire length. He described and documented all the results in a book,
"The Galvanic Circuit Investigated Mathematically," which initially
refused but later admitted, leading to the formation of Ohm's Law. Ohm's law
can be written in simple mathematical equation: I = V / R, where I is the
electric current is measured in amperes, V is the voltage, and R is for
resistance. In this equation, the resistance is usually a constant variable,
because its value is not dependent on the amount of electric current, but on
the material used to make a circuit, such as a metal wire and resistor itself.
The formula can be expressed in other forms such as inverted V = IR or R = V /
I. This formula upside down can help find the value of the element if the
values of the other two elements have been identified. There are essentially three
"truth" statement that we should remember about Ohm's Law. The first
statement is that the price I would be increased or decreased if the value of V
increased or decreased, respectively. The second statement is that I value will
decrease if the value of R increases and the value V unchanged. The third
statement is that I value will increase if the value of R decreases and the
value of V remains the same. Ohm's Law principle can be applied to practical
use in tools and equipment operated by electricity or batteries. For example, a
simple light-emitting diode (LED) only requires 2 volts and 02 amperes to
illuminate, but is connected to a 6-volt battery. This can cause the LED to
occur a short circuit, and a resistor is needed to reduce the current. Using
the formula R = V / I, we can determine that which contains 200 ohm resistor is
needed to control the current into the LED.
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