Question

tech a says that in a series circuit with two resistors of 120 ohms each, the total circuit resistance is 240 ohms. tech b says that in a parallel circuit with two resistors of 120 ohms each, the total circuit resistance is 240 ohms. who is correct? select one: a. technician a b. technician b c. both technicians a and b d. neither technician a nor b

Explanation:

Step1: Calculate series resistance

For series circuit, \(R_{total}=R_1 + R_2\). Given \(R_1 = R_2=120\ \Omega\), then \(R_{total}=120 + 120=240\ \Omega\). So Tech A is correct.

Step2: Calculate parallel resistance

For parallel circuit, \(\frac{1}{R_{total}}=\frac{1}{R_1}+\frac{1}{R_2}\). Substituting \(R_1 = R_2 = 120\ \Omega\), we get \(\frac{1}{R_{total}}=\frac{1}{120}+\frac{1}{120}=\frac{2}{120}=\frac{1}{60}\), so \(R_{total} = 60\ \Omega\). Tech B is wrong.

Answer:

a. Technician A