NCTI Service Technician Practice Exam

Question: 1 / 685

What will be the total XL of four inductors in series with values of 20 Ω, 40 Ω, 10 Ω, and 80 Ω?

50 Ω

100 Ω

150 Ω

When inductors are connected in series, their total inductive reactance (represented as XL) is simply the sum of the individual reactances. This is because inductive reactance, which depends on frequency and the inductance values, accumulates in a series circuit.

In this case, you add the values of each inductor together:

- The first inductor contributes 20 Ω.

- The second inductor contributes 40 Ω.

- The third inductor contributes 10 Ω.

- The fourth inductor contributes 80 Ω.

By summing these values:

20 Ω + 40 Ω + 10 Ω + 80 Ω = 150 Ω.

Therefore, the total inductive reactance XL for the four inductors in series is 150 Ω. This summation process illustrates that the total reactance in a series circuit builds up with each additional component.

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200 Ω

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