## What is ohms law calculator (online):

It is basically a calculator based on the principle of ohm's law. You can calculate the third parameter of any dc circuit , if the other two parameter a circuit is known to you.

(Go to the bottom to take part in the ohm's law Top 10 mcq quiz)

The three main parameters are Voltage (V) , Current(I) and Resistance (R). And the relation between them is

(Go to the bottom to take part in the ohm's law Top 10 mcq quiz)

The three main parameters are Voltage (V) , Current(I) and Resistance (R). And the relation between them is

**V=I*R.**

Here in this calculator you can additionally calculate the 4'th most important parameter of any circuit, that is power (P).

## DC Ω - Ohm's Law Calculator

Voltage (V) | Volts (V) | |

Resistance (R) | Ohms (Ω) | |

Current (I) | Amps (A) | |

Power (P) | Watts (W) |

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### How to use

- Enter any two variables in the fields.
- Click Calc button.

### How to calc

- Ohm's law: Wikipedia page
- Electric power: Wikipedia page

### Statement of ohms law :

"The ratio of potential difference (V) between any two points on a conductor to the current (I) flowing between them is constant, provided the temperature of the conductor does not change."

Or

"The potential difference between any two points of a conductor is directly proportional to the current flowing between them. Provided the temperature of the conductor does not change"

Now the Ohms law calculator does the same for you. It is truly based on the above said principle ,

where the main guiding equation is V=I*R

In addition, to calculate the DC Power(P) we have used the formula of DC Power

Which is

**P=V**^{2}/R Or.**P=I**^{2}/R Or.**P=V*I**

Here you can see that you only need any two parameter at a time to calculate the third parameter , and at the same time the fourth parameter is kept constant.

### Things to remember before you use the ohms law calculator:

This calculator is valid only for the DC network .

And also according to ohms law the resistance should be constant in nature. Or the V-I curve of the resistance should be liner. Ie, the calculator is valid only for the ohmic conductor .

The resistance of a Non ohmic conductor or any other parameter can not be calculated through this ohms law calculator.

For example , You have a 100 watt build of 230 volt . If you put these values here then you will see the resistance of the bulb is showing 592 Ohm ,and Current is something around 0.43 Amp

But if you check the resistance of that same bulb using a multimeter then it would show a completely different value which much lower than the calculated value.

This happens because the temperature of the bulb is not constant all the time, hence the ohms law is not applicable in this case.

For information: the electric bulb is made of tungsten metal and which has a non liner characterises , it has a positive temperature coefficient of resistance.

So that with the increase in temperature it increases the resistance of the filament.

Hope this ohms law calculator helped you. See you in the next post till then good bye

Hope you have leaned something new today.

Hope you have leaned something new today.

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