Network powering 16 Flashcards Preview

2016 Master > Network powering 16 > Flashcards

Flashcards in Network powering 16 Deck (22):
1

The direction of an electrical field in a radiated wave

Polarity

2

Four types of AC waveforms

Sine wave, Square wave, Quasi-square wave, and Sawtooth wave

3

(RMS)

Root Mean Square

4

What is the relationship between two signal attributes that are represented graphically

Waveform

5

One complete sine wave

A Cycle

6

The number of cycles of an AC waveform that occur in one second

One Hertz

7

Cycles per second

Frequency

8

The physical length of one cycle of the voltage waveform

Wavelength

9

The peak value of an AC waveform

Amplitude

10

The position of the amplitude value as related to time

Phase

11

Resistance equals voltage divided by current

Ohm's Law

12

The amount of energy available to move a certain number of electrons from one point to another in an electrical circuit

Voltage

13

Batteries should be inspected every ___to ___ months to ensure optimum performance

3 to 6

14

Transformer that takes 120VAC to 60 or 90VAC

Step down, Ferroresonant transformer

15

Center conductor resistance + Sheath resistance=

DC Loop resistance

16

Batteries also produce _____________ gas during charging operations. This gas may vent in an overcharging situation

Hydrogen

17

When removing batteries, always switch the module's TURN ___________________off before disconnecting the battery connector.

Battery breaker

18

Measured in Ohms, the opposition a material offers to the flow of current, used to control the amount of amperage in a circuit.

Resistance (R)

19

Which way do electrons flow in a circuit?

From negative to positive

20

Wavelength formula

Wavelength = Speed of Light / Frequency

21

The electricity provided by the local power company.

Commercial Power

22

Differences between any batteries in the set should not be greater than

0.3 VDC

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