Question

if resistance R1, r2 and r3 is resistance 30ohm. what is the total resistance if r1 is connected in series and the r2, r3 are connected to prallel

Answer 1

r1 = r2 = r3 = 30 Ohm

r1 +  1/(1/r2+1/r3)

30 + 1/(1/30 + 1/30)

30 + 30/2

30 + 15

45 Ohm

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