Consider an ideal transformer with 100 turns of wire in the primary and 500 turns of wire in the secondary. If the primary coil is fed with 110 V, rms, what is the power consumed by the device connected to the secondary that behaves as a resistor.

## Consider an ideal transformer with 100 turns of wire in the primary and 500 turns of wire in the secondary. If the primary coil is fed with 110 V, rms, what is the power consumed by the device connected to the secondary that behaves as a resistor.

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Using the average won’t work very well. We use some other values. We use Peak to Peak voltage, Vpp, Peak Voltage, Vp, and we use RMS voltage. We will discuss RMS voltage in more detail in class. What is the peak voltage and peak to peak voltage for the signal shown above?

## Using the average won’t work very well. We use some other values. We use Peak to Peak voltage, Vpp, Peak Voltage, Vp, and we use RMS voltage. We will discuss RMS voltage in more detail in class. What is the peak voltage and peak to peak voltage for the signal shown above?

Peak voltage: +1 volt Peak to peak voltage = 2 … Read More...
A resistor R and a capacitor with a reactance of 40 Ohm in a series with a 120 volts RMS source. If the Rms current in this circuit is 2.4 Amps, what is R ? 1) 30 ohm 2) 40 ohm 3) 50 Ohm 4) 90 Ohm 5) 1600 ohm.

## A resistor R and a capacitor with a reactance of 40 Ohm in a series with a 120 volts RMS source. If the Rms current in this circuit is 2.4 Amps, what is R ? 1) 30 ohm 2) 40 ohm 3) 50 Ohm 4) 90 Ohm 5) 1600 ohm.

A transformer has 300 turns in the primary coil and 50 turns in the secondary coil. If the RMS voltage in the primary is coil is 120 volts, find the power lost in the 20 Ohm resistor. 1) 0.5 watts 2) 1watts 3) 5 watts 4) 10 watts 5) 20 watts.

## A transformer has 300 turns in the primary coil and 50 turns in the secondary coil. If the RMS voltage in the primary is coil is 120 volts, find the power lost in the 20 Ohm resistor. 1) 0.5 watts 2) 1watts 3) 5 watts 4) 10 watts 5) 20 watts.

6. (20 pts) (Nilsson & Riedel, p. 391, 10.34.) A group of small appliances on a 60Hz system requires 20kVA at 0.85 lagging pf when operated at 125 VRMS. The impedance of the line supplying the appliances is 0.01 +j0.08 Ω. The voltage at the load end of the line is 125VRMS. a) What is the RMS magnitude of the voltage at the Source? b) What is the average power loss in the line, PLINE? c) What size of capacitor in μF across the load end of the feeder is needed to change the load pf to 1. d) After the capacitor is installed, what is VRMS at the source, if the load voltage is maintained at 125VRMS? e) What is the average power loss in the line, PLINE with the capacitor installed?

## 6. (20 pts) (Nilsson & Riedel, p. 391, 10.34.) A group of small appliances on a 60Hz system requires 20kVA at 0.85 lagging pf when operated at 125 VRMS. The impedance of the line supplying the appliances is 0.01 +j0.08 Ω. The voltage at the load end of the line is 125VRMS. a) What is the RMS magnitude of the voltage at the Source? b) What is the average power loss in the line, PLINE? c) What size of capacitor in μF across the load end of the feeder is needed to change the load pf to 1. d) After the capacitor is installed, what is VRMS at the source, if the load voltage is maintained at 125VRMS? e) What is the average power loss in the line, PLINE with the capacitor installed?

In the circuit X1=5 OHMs Xc=2 ohms and R=4ohms . what is the RMS current in the circuit? 1) 4.8 A 2) 15 A 3) 17A 4) 24A 5)30 A

## In the circuit X1=5 OHMs Xc=2 ohms and R=4ohms . what is the RMS current in the circuit? 1) 4.8 A 2) 15 A 3) 17A 4) 24A 5)30 A

ELEC153 Circuit Theory II M2A1 Textbook Assignment: Problem Set A: Chapter 15 Instructions Save this document and place your answers into it so you can submit it to the appropriate homework dropbox. Handwritten solutions should be scanned and saved as a BMP, GIF, or JPG image, or scanned and pasted into this document. Questions 1. Find the impedance of this AC series circuit as seen from the two open-ended terminals. Show your answer in rectangular and polar form. The AC signal frequency is 1 KHz. 2. Repeat your analysis of Question 1 for a frequency of 200 Hz. 3. Consider the following AC series circuit: a. Find the total impedance across the voltage source in polar form. b. Find the source current, in polar form. Note: the source voltage is 20 volts rms at 0 degrees. c. Find the voltage across each component, in polar form. d. Find the real power supplied to the circuit, in Watts. ELEC153 Circuit Theory II M2A2 Textbook Assignment: Problem Set B: Chapter 15 Instructions Save this document and place your answers into it so you can submit it to the appropriate homework dropbox. Handwritten solutions should be scanned and saved as a BMP, GIF, or JPG image, or scanned and pasted into this document. Questions 1. Find the impedance of this AC parallel circuit between the two open-ended terminals, in rectangular and polar forms: 2. Consider the following AC parallel circuit: a. Find the total impedance across the voltage source in polar form. b. Find the source current, in polar form. Note: the source voltage is 12 volts rms at 0 degrees. c. Find the current through each component, in polar form. d. Find the real power supplied to the circuit, in Watts.

## ELEC153 Circuit Theory II M2A1 Textbook Assignment: Problem Set A: Chapter 15 Instructions Save this document and place your answers into it so you can submit it to the appropriate homework dropbox. Handwritten solutions should be scanned and saved as a BMP, GIF, or JPG image, or scanned and pasted into this document. Questions 1. Find the impedance of this AC series circuit as seen from the two open-ended terminals. Show your answer in rectangular and polar form. The AC signal frequency is 1 KHz. 2. Repeat your analysis of Question 1 for a frequency of 200 Hz. 3. Consider the following AC series circuit: a. Find the total impedance across the voltage source in polar form. b. Find the source current, in polar form. Note: the source voltage is 20 volts rms at 0 degrees. c. Find the voltage across each component, in polar form. d. Find the real power supplied to the circuit, in Watts. ELEC153 Circuit Theory II M2A2 Textbook Assignment: Problem Set B: Chapter 15 Instructions Save this document and place your answers into it so you can submit it to the appropriate homework dropbox. Handwritten solutions should be scanned and saved as a BMP, GIF, or JPG image, or scanned and pasted into this document. Questions 1. Find the impedance of this AC parallel circuit between the two open-ended terminals, in rectangular and polar forms: 2. Consider the following AC parallel circuit: a. Find the total impedance across the voltage source in polar form. b. Find the source current, in polar form. Note: the source voltage is 12 volts rms at 0 degrees. c. Find the current through each component, in polar form. d. Find the real power supplied to the circuit, in Watts.

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(Nilsson & Riedel, p. 391, 10.34.) A group of small appliances on a 60Hz system requires 20kVA at 0.85 lagging pf when operated at 125 VRMS. The impedance of the line supplying the appliances is 0.01 +j0.08 Ω. The voltage at the load end of the line is 125VRMS. a) What is the RMS magnitude of the voltage at the Source? b) What is the average power loss in the line, PLINE? c) What size of capacitor in μF across the load end of the feeder is needed to change the load pf to 1. d) After the capacitor is installed, what is VRMS at the source, if the load voltage is maintained at 125VRMS? e) What is the average power loss in the line, PLINE with the capacitor installed

## (Nilsson & Riedel, p. 391, 10.34.) A group of small appliances on a 60Hz system requires 20kVA at 0.85 lagging pf when operated at 125 VRMS. The impedance of the line supplying the appliances is 0.01 +j0.08 Ω. The voltage at the load end of the line is 125VRMS. a) What is the RMS magnitude of the voltage at the Source? b) What is the average power loss in the line, PLINE? c) What size of capacitor in μF across the load end of the feeder is needed to change the load pf to 1. d) After the capacitor is installed, what is VRMS at the source, if the load voltage is maintained at 125VRMS? e) What is the average power loss in the line, PLINE with the capacitor installed

Problem 6.7 A buck converter has an input of 60V and an output fo 25V. The load resistor is 9Ω, the switching frequency is 20-kHz, L=1mH, and C=200μF. a. Determine the duty ratio. b. Determine the average, peak, and rms inductor current. c. Determine the average source current. d. Determine the peak and average diode current.

## Problem 6.7 A buck converter has an input of 60V and an output fo 25V. The load resistor is 9Ω, the switching frequency is 20-kHz, L=1mH, and C=200μF. a. Determine the duty ratio. b. Determine the average, peak, and rms inductor current. c. Determine the average source current. d. Determine the peak and average diode current.

A transformer has 100 turns in primary coil and 20 turns in the secondary coil. If the RMS voltage in the primary is 120 volts , find the RMS current through the 8 Ohm resistor in the secondary. A) 3 Amps B) 4.2 Amps C) 6Amps D) 24 Amps E) 75 Amps.