Rather it is an empirical law that has been found by experiment to work fairly well most of the time. As another application, electronic devices often have resistors placed in the circuit to increase the resistance and therefore limit the current.
When a short circuit occurs, most of the electrical resistance in the circuit is bypassed. Hence, the short circuit will produce a current high enough to blow the fuse.
For example, why will a short circuit blow a fuse or circuit breaker?
Ohm found that for most electric circuits, the voltage across the circuit was equal to the current flowing through the circuit times the electrical resistance of the circuit. It is everywhere and used by many whether they notice it or not.
We used this many times when we were calculating current, voltage, or resistance in our labs. That is the most common way of identifying a type of resistor.
The resistance that is measured is usually written on the side of the resistor or on the box that it comes in. The resistance is therefore in volts per ampere, which is defined as ohms.
The voltage, properly called the potential difference, is measured in volts, and the current in amperes amps. In effect, a new circuit with a very low resistance is created. It is also available from the circuit schematic, or drawing of the circuit for which you are building or testing.
The resistance of a resistor can also be determined by the number, color, and order of stripes on the side of it.
Fuses and circuit breakers are designed to protect the circuit by blowing when the current becomes too high. The principle is named after the German scientist George Simon Ohm. Connect negative lead of your voltmeter to ground or power source return line and you can measure the voltage on as many things that are accessible to your meter probe that you want.
This form of ohms law is most useful for technicians because it is easy to measure voltage with a voltmeter.
Usually one current calculation and several voltage measurements tell you all you need to know about the transistors, diodes, and amplifiers. This law is named after its discoverer, Georg Simon Ohm. For the same voltage, a circuit with a low resistance will have a higher current than a circuit with a higher resistance.
Ohms law states that current in amperes is equal to voltage divided by resistance.Essay on Current, Voltage, Resistance and Ohms Law energy, as well as dissipating or converting it.
The electrical resistance per unit length, area, or volume of a substance is known as resistivity. May 03, · Conclusion Ohm's Law states that V=RI where V is the difference of potential at the poles of the element (measured in volts), R is the resistance of the element being tested (a resistor in this case, measured in ohms), and I is the current passing through the circuit (measured in milliamps).
Ohms Law This Essay Ohms Law and other 64,+ term papers, college essay examples and free essays are available now on killarney10mile.com Autor: review • December 25, • Essay • Words (2 Pages) • Views. Voltage: Ohms Law And Kirchhoffs Rules Essay - Voltage: Ohm's Law and Kirchhoff's Rules ABSTRACT Ohm's Law and Kirchhoff's rules is fundamental for the understanding of dc circuit.
This experiment proves and show how these rules can be applied to so simple dc circuits. Ohm's Law Essay. Submitted By Carlos Words: Pages: 5.
Open Document. OHM'S LAW and R is the resistance of the conductor in units of ohms. More specifically, Ohm's law states that the R in this relation is. Conductivity is defined by Ohm's law: U = R I, (1) where I is the current (in Amperes) through a resistor and U is the drop in potential (in Volts) across it.
The proportionality constant R is called the "resistance- measured in Ohms (?). 3/5(2).Download