series resistance

Question

Equivalent resistance of two resistors R and 2R in series is:

RankGuru · Accepted Answer

In a series combination, the same current flows through all resistors. The total potential drop is the sum of individual drops:
$V_{total} = IR_1 + IR_2 = I(R_1 + R_2)$
$R_{series} = R_1 + R_2 = R + 2R = 3R$.

Rank Guru

series resistance

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