# Shared Flashcard Set

## Details

NAVEDTRA 14174A CH. 1
Neets Module 2
10
Aviation
Professional
12/01/2013

Term
 Alternating current can be defined as current that varies in what?
Definition
 Amplitude and direction
Term
 Before a 120-volt dc source can be used to power a 12-volt load, the voltage must be reduced. Which of the following methods can be used?
Definition
 A resistor placed in series with the load
Term
 Alternating current has replaced direct currnet in modern transmission systems because it has what advantage?
Definition
 AC can be readily stepped up or down
Term
 A waveform is a graphic plot of what quantities?
Definition
 Amplitude versus time
Term
 What property surrounds a current-carrying load?
Definition
 A magnetic field
Term
 Which of the following statements accurately describes the magnetic field surrounding a current-carrying conductor?
Definition
 It is perpendicular to and equal along all parts of the conductor
Term
 When you grasp a coil in your left hand with your thumb pointing in the direction of the north pole, your fingers will be wrapped around the coil in the direction of the what?
Definition
 Current flow
Term
 The power consumed in a conductor in realigning the atoms which set up the magnetic field is known as what type of loss?
Definition
 Hysteresis loss
Term
 The magnetic field surrounding a straight conductor is (a) what shape, and (b) is in what position relative to the conductor?
Definition
 (a) Concentric circles (b) Perpendicular
Term
 What is the unit of measurement for frequency?
Definition
 Hertz
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