. If a series–parallel circuit has all 30-ohm resistors, what is the tota

Question

. If a series–parallel circuit has all 30-ohm resistors, what is the total resistance when R1 is in series with a parallel circuit consisting of R2 and R3?

Options:

A . 10 ohms

B . 20 ohms

C . 45 ohms

D . 90 ohms

Answer: Option C

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