Asked by Daphne Scotese on May 05, 2024

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A series RL circuit contains two resistors and two inductors. The resistors are 33 Ω and 47 Ω . The inductors have inductive reactances of 60 Ω and 30 Ω . The applied voltage is 120 V. What is the voltage drop on the 33 Ω resistor?

A) 32.89 V
B) 46.84 V
C) 55 V
D) 60 V

Voltage Drop

The amount of voltage required to cause an amount of current to flow through a certain resistance.

Series RL Circuit

An electrical circuit that contains both a resistor (R) and an inductor (L) connected in series, which impacts the phase and amplitude of the circuit's response.

Inductive Reactance

The opposition offered by an inductor to the flow of alternating current in a circuit, quantified in ohms.

  • Assess the drop in voltage over resistors and inductors in series RL arrangements.
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EM
Emily MorganMay 12, 2024
Final Answer :
A
Explanation :
To find the voltage drop across the 33 Ω resistor in a series RL circuit, first, calculate the total impedance (Z) of the circuit. The total resistance (R) is the sum of the individual resistances: R = 33 Ω + 47 Ω = 80 Ω. The total inductive reactance (X_L) is the sum of the individual inductive reactances: X_L = 60 Ω + 30 Ω = 90 Ω. The total impedance (Z) can be calculated using the formula Z = √(R^2 + X_L^2) = √(80^2 + 90^2) = √(6400 + 8100) = √14500 ≈ 120.42 Ω. The current (I) in the circuit can be found using Ohm's law: I = V / Z = 120 V / 120.42 Ω ≈ 0.996 A. The voltage drop (V_R) across the 33 Ω resistor can be calculated using Ohm's law: V_R = I * R = 0.996 A * 33 Ω ≈ 32.89 V.