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Tuesday, March 8, 2011

resistors in parallel

Resistors in parallel. 1/R Total = 1/R1 + 1/R2 + 1/R3 + .

Resistors in parallel. 1/R Total = 1/R1 + 1/R2 + 1/R3 + .

Two Resistors in Parallel

Two Resistors in Parallel

Resistors in parallel - resistors R1, R2, R3 are in parallel on separate

Resistors in parallel - resistors R1, R2, R3 are in parallel on separate

Or you can use 8 resistors in parallel (10/8=1.25) on the bottom portion

Or you can use 8 resistors in parallel (10/8=1.25) on the bottom portion

2 resistors in parallel Resistors_In_Parallel_2.gif

2 resistors in parallel Resistors_In_Parallel_2.gif

We can prove the equation for parallel resistors by using Kirchhoff's

We can prove the equation for parallel resistors by using Kirchhoff's

3 resistors in parallel Resistors_In_Parallel_3.gif

3 resistors in parallel Resistors_In_Parallel_3.gif

In the case of adding more resistors in parallel, less overall resistance is

In the case of adding more resistors in parallel, less overall resistance is

Calculate the equivalent resistor for a number of parallel resistors

Calculate the equivalent resistor for a number of parallel resistors

The red is a 10K assembly (two 20K resistors in parallel), the yellow is 15K

The red is a 10K assembly (two 20K resistors in parallel), the yellow is 15K

Figures (c) and (d) show combinations of series and parallel resistors.

Figures (c) and (d) show combinations of series and parallel resistors.

The resistor #1 is the original, the #2 and #3 are two resistors in parallel

The resistor #1 is the original, the #2 and #3 are two resistors in parallel

 in parallel per 3886 output instead of one 3W resistor because 3W

in parallel per 3886 output instead of one 3W resistor because 3W

Task 1: Combining resistances in parallel. Model 1. Open the Yenka Model 1.

Task 1: Combining resistances in parallel. Model 1. Open the Yenka Model 1.

Here you see two 1000 ohm resistors in parallel.

Here you see two 1000 ohm resistors in parallel.

When you add new resistors to the circuit in parallel, equivalent resistance

When you add new resistors to the circuit in parallel, equivalent resistance

It shows 3 resistors in parallel. They can have any value.

It shows 3 resistors in parallel. They can have any value.

I've pointed out the node where all three resistors are connected.

I've pointed out the node where all three resistors are connected.

If we connect two resistors in parallel, the equivalent conductance is the

If we connect two resistors in parallel, the equivalent conductance is the

 the trick is to replace any resistors in parallel with the equivalent

the trick is to replace any resistors in parallel with the equivalent