Chapter 8, Electromagnets, Inductors, and Transformers

pete.c.diaz
Flashcards by pete.c.diaz, updated more than 1 year ago
pete.c.diaz
Created by pete.c.diaz almost 7 years ago
129
0

Description

Electronics A complete Course Second Edition, Nigel P. Cook

Resource summary

Question Answer
As current passes through a conductor: a magnetic field is developed
When an electromagnet reaches maximum strength, it is considered to be: at saturation
A rapidly reversing magnetic field causes heat dissipation know as: Hysteresis loss
A conductor’s magnetic field causes heat dissipation know as: current flowing through it
Electromagnetism induction is the generation of: electricity from magnetism
An inductor is rated by a unit named: Henry
What is one characteristic of an induction? passes dc
Inductance is the ability of a coil to oppose: current change
The formula to determine total inductance when inductors are connected in parallel is similar to: Series capacitors
10. Three parallel inductors of 84 mh, 96 mh, and 160 mh, will provide a total inductance of how many millihenrys? 35
Opposition to current flow without the dissipation of energy is called: Inductive reactance
In an inductive circuit, reactance will: XL = 2^ f L Increase with frequency
What is the phase angle in a purely inductive circuit? 90 degrees
14. What is the inductive reactance of a 1mH coil, when the applied frequency is 15 kHz? XL = 2^f L = 2^(15,000Hz)(.001H) = ? 94.2 ohms
15. What is the impedance of a 1 kHz series RL circuit, when R and XL are both 1000 ohms? Z = R2 + XL2 = (1000)2 + (1000)2 = ? 1414 ohms
What is the total impedance of a series circuit, when the applied frequency is 455 KHz, and L=10 mH? XL = 2^ f L = 2^ (455,00)(.010) XL = 28.59 Kohm Zt = (15.)2 + (28.59)2 = ? 32.2 K ohms
What is the true power of a 24 Vac parallel RL circuit, when R = 45 ohms, and XL = 1100 ohms? P true = (Vs)2 / R (24v)2 / 45ohm = ? 12.8 watts
The circuit impedance for a 60 Vac single coil circuit that has a coil current of 4.47 amps is: V = I Z / Z = V 60v/4.47=? 13.42 ohms
Show full summary Hide full summary

Similar

Atoms and Reactions
siobhan.quirk
A-level Psychology Key Terms & Definitions
Andrea Leyden
Salesforce Admin 201 Exam Chunk 6 (156-179)
Brianne Wright
Educación y El Mercado de Trabajo
tania suchite
Elementos significativos de la ética de la profesión
Silvia Mantilla
Planeación estratégica
FAYZULY FREILE RIVERA ESTUDIANTE
Mapas mentales con GoConqr
Ayelen Caballero
Organigramas
Sindy Deydania
ANCHO Y ALTURA
Lida Diaz
máquinas y estructuras
Agustina Moyano
auditoria administrativa
karen cortes