
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN: 9780133923605
Author: Robert L. Boylestad
Publisher: PEARSON
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Transcribed Image Text:**Transcription for Educational Website:**
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**Physics and Electrical Engineering Practice Questions**
**Question 79:**
Which of the following formulas can be used with Ohm's law to determine the amount of voltage necessary to push 1 ampere of current through ohms of resistance?
- \( a. \quad E = I \times R \)
\( \quad \quad \quad \text{I = 0.8 A} \)
\( \quad \quad \quad \text{E = 4.8 V} \)
- \( b. \quad X_L = 2 \pi f L \)
- \( c. \quad I = \frac{E}{X_L} \)
- \( d. \quad X_T = X_1 + X_2 + X_3 \)
**Question 80:**
A ceiling fan has a light kit attached to the fan. What type of load is the light kit?
- \( a. \quad \text{power} \)
- \( b. \quad \text{capacitive} \)
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**Explanation of Terms and Diagrams:**
- **Ohm’s Law Formula:** Ohm’s law is essential for calculating electrical quantities. The formula \( E = I \times R \) (where E is voltage, I is current, and R is resistance) is commonly used to find one of these values when the other two are known.
- **Inductive Reactance Formula (\( X_L = 2 \pi f L \)):** This formula is used to calculate the inductive reactance in an AC circuit, where \( f \) is the frequency and \( L \) is the inductance.
- **Formula for Total Reactance (\( X_T = X_1 + X_2 + X_3 \)):** This is used to calculate the total reactance in circuits that have multiple reactances in series.
- **Types of Loads:** In electrical circuits, loads can be categorized based on their characteristics, such as power loads or capacitive loads. A power load is typically resistive, consuming power in the form of heat or light.
These problems assist students in applying theoretical concepts to practical scenarios in electrical circuits, fostering a deeper understanding of fundamental principles used in physics and engineering.
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