Calculate the resistance of the circuit section, the diagram of which is shown in Fig
| May 26, 2021 | education
Calculate the resistance of the circuit section, the diagram of which is shown in Fig. 172, if R1 = 120 Ohm, R2 = 18 Ohm, R3 = 27 Ohm, R4 = 9 Ohm.
Determine the resistance in the section of the circuit with parallel connection of conductors with resistance R3 and R4.
The resistance for parallel connection of a pair of conductors is equal to the ratio of the product of resistances by their sum.
R34 = (R3 * R4) / (R3 + R4) = 27 * 9/36 = 6.75 ohms.
Determine the resistance when the conductors R1, R2, R34 are connected in series.
Rchains = R1 + R2 + R34 = 120 + 18 + 6.75 = 144.75 Ohm.
Answer: The total resistance of the circuit section is 144.75 ohms.
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