Question

2. Single Phase Power Calculations (20 Points) Given: • The source voltage is 120 V. • The frequency is 60Hz. • $R_{load} = 4\Omega \ X_L = 3\Omega$. Find: 1. What is the line current if the load is connected in series? 2. What is the real power fed to the resistive load? 3. What is the reactive power fed to the inductive load? 4. Sketch the real and reactive power phase relationship in the complex plane. 5. If you want to correct the power factor what is the value of the parallel capacitor you would need to attach to the load? (Capacitor value not the capacitive reactance.) Explain why. 6. Explain what the real and reactive currents are doing in all three components by drawing the circuit and labeling the currents.

          2. Single Phase Power Calculations (20 Points)
Given:
• The source voltage is 120 V.
• The frequency is 60Hz.
• $R_{load} = 4\Omega \ X_L = 3\Omega$.
Find:
1. What is the line current if the load is connected in series?
2. What is the real power fed to the resistive load?
3. What is the reactive power fed to the inductive load?
4. Sketch the real and reactive power phase relationship in the complex plane.
5. If you want to correct the power factor what is the value of the parallel capacitor you
would need to attach to the load? (Capacitor value not the capacitive reactance.) Explain
why.
6. Explain what the real and reactive currents are doing in all three components by drawing
the circuit and labeling the currents.

2. Single Phase Power Calculations (20 Points)
Given:
• The source voltage is 120 V.
• The frequency is 60Hz.
• Rload = 4Ω XL = 3Ω.
Find:
1. What is the line current if the load is connected in series?
2. What is the real power fed to the resistive load?
3. What is the reactive power fed to the inductive load?
4. Sketch the real and reactive power phase relationship in the complex plane.
5. If you want to correct the power factor what is the value of the parallel capacitor you
would need to attach to the load? (Capacitor value not the capacitive reactance.) Explain
why.
6. Explain what the real and reactive currents are doing in all three components by drawing
the circuit and labeling the currents.

Added by David W.

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