Easily calculate parallel connected resistors resistance using this online parallel resistor calculator. You can calculate up-to 10 resistors parallel circuit resistance at a time. Find the correct resistors code values and enter on the given parallel resistance calculator box given below. If you are difficult to check the resistor value please check the online resistor color code calculator. The resistor color code link given below.
Also Check : Resistor color code calculator
( You can even enter the total resistance Rtotal and one known resistance R1 or R2 ).
Calculate Multiple Resistor in Parallel Calculator
Please enter multiple number of parallel resistors (in ohms) to calaculate the parallel resistance
The Resistor
The resistors are the tiny electronic components, that are very familiar with most of the peoples. The electronics hobbyist or not interested peoples also seen resistors in many printed circuit board. So i hope you will know something about resistors, ok. Now lets goes to the main topic, parallel connection of a resistor. Why you need parallel connection ? So before going to talk about parallel connection just share the basic first.
The resistor is made with semi conductor material, which will resist the passage of current through one terminal to other terminal. The resistor have only two terminals. The resistance of the resistor is denoted by using the color code on the resister itself. The color of the ring on the resistor changes the resistance value also change. The high value means the highest resistance to the potential current. It is very difficult to pass through it.
Resistors in parallel Connection
The resistor is in parallel connection means, the 2 or more resistors are connected both ends at same orientation or parallel to each terminals. To find whether the resistors are in parallel or series connection easily ? If the resistor connected end to end each other like train bogies, is known as the series connection. Now it is very clear to understand.
If you are connecting many resistors all connecting in parallel , the total resistance of the resistor will always be less than the smallest resistor value. AS per the equation,
P =VI and The resistor in parallel have same voltage across them in all time. But the changing factor is current flow through it. Many resistors are connecting in parallel the tiny current flow through each of the transistors are makes a huge current reviving at the other end.
Example : You have 10v battery and a 1K resistor. You put the resistor on series connection with battery poles, by measuring the current flow it shows 1mA. If you put a 10K resistor parallel to the 1K resistor the current flow will not change across the battery and circuit. But the 10 K resistor draw only 0.1mA current across the battery. From the equation V =IR its common for all electronic devices. The voltage, current and resistance are also correlated with each other.
Resistor in parallel calculation
The two resistors are connected in parallel R1 and R2, then the equation to calculate the parallel resistance of resistor is,
1/Rtotal = 1/R1+1/R2
Solving the formula to obtain the formulas
Rtotal = ( R1*R2 )/(R1+R2)
To obtain the value of R1 then the formula will be
1/Rtotal = 1/R1+1/R2
Rtotal*R1*R2 {1/Rtotal = 1/R1+1/R2]
R1*R2 = Rtotal*R2+Rtotal*R1
R1*R2-Rtotal *R1 =Rtotal * R2
R1(R2-Rtotal) = R2*Rtotal
So, R1 = R2*Rtotal / (R2-Rtotal)
