## 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 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)

### How to use

1. Enter any two variables in the fields.
2. Click Calc button.

### 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=V2/R              Or.
•  P=I2/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.

### Top 10 mcq Quiz related to ohms law :

This quiz need email to be submitted in rder to limit one response per user. Also get your answer and marks via email.

### All about Star Delta winding connection

What is star and delta connection?
There are mainly 2 types of 3 phase winding connection, namely the star or Wye (Y) connection and the delta or D connection.
The Star or Y connection:
If we connect the each end of winding to a common point and The rest of the three points of three windings are connected to the supply , to form a Y shaped 3 phase winding then it is said to be star connected winding.

The star winding has some special characteristics, these are:
In case of star winding each phase winding carries 1/√3 times the phase to phase / line voltage.Each of the winding carries current that is equal to the load currentIt has a common neutral point , and so that it can supply 3 phase as well as single phase loadGenerally it is the distribution part
* Here the term 'phase current/voltage' means the current/voltage that is flowing through each of the winding and the term load current/ voltage stands for the current/voltage that is applied across the load or supply terminal The D…

### Calculate resistance with resistor colour code calculator

Calculate resistance with resistor colour code calculator

Graphical Resistor Calculator Graphical Resistor Calculator is a Free Software to easily calculate the resistance of registers from the band colors.
Simply change the values from the dropdown menus.
Band 1Band 2Band 3Band 4Value 1 (MSV)Value 2WeightToleranceBlack (0)Brown (1)Red (2)Orange (3)Yellow (4)Green (5)Blue (6)Violet (7)Gray (8)White (9)Black (0)Brown (1)Red (2)Orange (3)Yellow (4)Green (5)Blue (6)Violet (7)Gray (8)White (9)Black (1)Brown (10)Red (100)Orange (1k)Yellow (10k)Green (100k)Blue (1M)Violet (10M)Gray (100M)White (1G)Gold (± 5%)Silver (± 10%) Resistance:  1,000 Ω ±5%
Graphical Resistor Calculator Reference Chart Standard Table For Calculating 4 Band Resistors' Resistance.
ColorDigit valueMultiplierMultiplied OutToleranceBlack01001Brown110110Red2102100Orange31031,000Yellow410410000Green5105100,000Blue61061,000,000Violet710710,000,000Gray8108100,000,000White91091,000,000,000Gold±5%Silver±10% Content resistanc…