How Do You Calculate Total Resistance?

[Fatima Hasan]

Homework Statement

Homework Equations

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The Attempt at a Solution

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Could anyone check my answer please ?

 

[mfb]

What is R_T? What is the total resistance?

Usually an answer is easier to check than to get - calculate voltages and currents and see if they work out.

 

[gneill]

Why are you taking $R_1$ and $R_2$ to be in parallel? Here's what your circuit looks like after your ∇ to Y transformation:

 

[phyzguy]

Just to be clear, your 6.22 Ohm answer is clearly wrong for the reason outlines by gneill.

 

[Fatima Hasan]

Why are you taking $R_1$ and $R_2$ to be in parallel? Here's what your circuit looks like after your ∇ to Y transformation:

View attachment 232843

 

[gneill]

Much better!