Calculate the resistance of the circuit section if R1 = 120 ohm, R2 = 18 ohm, R3 = 27 ohm, R4 = 9 ohm
| April 18, 2021 | education
Calculate the resistance of the circuit section if R1 = 120 ohm, R2 = 18 ohm, R3 = 27 ohm, R4 = 9 ohm, if the answer is 145 ohm
Resistors R3 and R4, in an electrical circuit, are connected in parallel, then:
R34 = R3 * R4 / (R3 + R4) = 27 * 9 / (27 + 9) = 243/36 = 6.75 ohms.
Resistors R1, R2, R34 are connected in series, then the total resistance of the electrical circuit is: Rrev = R1 + R2 + R34 = 120 + 18 + 6.75 = 144.75 Ohm.
Answer: The total resistance of the electrical circuit is 144.75 ohms.
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