In an RC parallel circuit, E T = 120 V, R = 40 Ω , and X C = 30 Ω . What is the power factor?A) 60%B) 80%C) 100%D) 133%

Question

In an RC parallel circuit, E T  = 120 V, R = 40 Ω , and X C  = 30 Ω . What is the power factor?A)  60%B)  80%C)  100%D)  133%

Jenny Chung · Accepted Answer

Final Answer : A, Explanation :  The power factor is given by cos(θ), where θ is the phase angle between the voltage and current. In a parallel circuit, the phase angle is given by tan(θ) = X C /R. Therefore, cos(θ) = R/√(R 2  + X C 2 ) = 40/√(40 2  + 30 2 ) = 0.8, or 80%.

In an RC parallel circuit, E_T = 120 V, R = 40 Ω , and X_C = 30 Ω . What is the power factor?

A) 60%
B) 80%
C) 100%
D) 133%

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Learning Objectives

Related questions

In an RC parallel circuit, ET = 120 V, R = 40 Ω , and XC = 30 Ω . What is the power factor?A) 60%B) 80%C) 100%D) 133%

Definitions

Learning Objectives

Learning Objectives

Related questions

In an RC parallel circuit, E_T = 120 V, R = 40 Ω , and X_C = 30 Ω . What is the power factor?

A) 60%
B) 80%
C) 100%
D) 133%