NICET Level 1 NTC Red Book Practice Test

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In a series circuit with R1 = 1000 ohms and R2 = 10 ohms, the total resistance is:

1,010 ohms

In a series circuit, resistances add together to give the total resistance. So with 1000 ohms and 10 ohms in series, the total resistance is 1000 + 10 = 1010 ohms. That value is the one listed as 1,010 ohms. In a series path, the current is the same through each resistor, and the resistances simply accumulate; you don’t get a total smaller than the largest resistor in a series arrangement. The other options would occur if you had a parallel arrangement or misinterpreted the setup, but they do not apply here. Therefore, the total resistance is 1010 ohms.

Less than 10 ohms

10 ohms

100 ohms