Combining Resistors in Series & Parallel Video Lessons

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Problem: Find the equivalent resistance of the combination of resistors shown in the figure.

FREE Expert Solution

Number the resistors as follows:

Equivalent resistance for resistors in parallel:

1Req=1R1+1R2+...+1Rn

or for 2 resistors:

Req=R1R2R1+R2

Equivalent resistance for resistors in series:

Req=R1+R2+...+Rn

Resistors 1 and 2 are in parallel:

R12 = (42.0)(75.0)/(42.0 + 75.0) = 26.923Ω

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Find the equivalent resistance of the combination of resistors shown in the figure.
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