Final answer:
The equivalent resistance of a series circuit with four resistors of 12, 20, 18, and 43 ohms is calculated by simply adding them together, resulting in a total resistance of 93 ohms.
Step-by-step explanation:
The student has asked a question about calculating the total or equivalent resistance in a series circuit with four resistors of specific ohm values. In a series circuit, the resistances simply add up to find the equivalent resistance. Using the equation Requiv = R₁ + R₂ + R3 + R4, where the values are 12 ohms, 20 ohms, 18 ohms, and 43 ohms respectively, we can calculate the total resistance.
The calculation would be as follows:
Requiv = 12 + 20 + 18 + 43
Requiv = 93 ohms.
Therefore, the equivalent resistance of the circuit with these four resistors in series is 93 ohms.