Flashcards in NAVEDTRA 14174A, NEETS Mod. 2, Ch. 4 Deck (15)

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1

## What are two things that are in step, going through a cycle together, falling together and rising together said to be in?

### Phase

2

## Which word is a very simple memory aide that is used to remember the relationship of voltage and current in an inductive circuit?

### ELI

3

## The voltage-current phase relationship in a capacitive circuit is exactly opposite to that in what?

### Inductive circuit

4

## The opposition which a capacitor offers to AC is inversely proportional to frequency and capacitance. What is this opposition called?

### Capacitive reactance

5

## AC circuits containing reactance also contain resistance, the two combine to oppose the flow of current. What is this combined opposition by the resistance and the reactance called?

### Impedance

6

## Which symbol is used to represent impedance?

### Z

7

## By how many degrees from that in a purely resistive circuit will the voltage in a purely reactive circuit differ in phase?

### 90

8

## When current is out of phase with the voltage, the power indicated by the product of the applied voltage and the total current gives only what is known as what?

### Apparent power

9

## Which symbol is used to represent phase angle?

### Theta

10

## Which type of power appears to the source because of the circuit impedance?

### Apparent power

11

## Which number (represented as a decimal or a percentage) represents the portion of the apparent power dissipated in a circuit?

### Power factor

12

## What is the easiest way to find the power factor?

### Find the Power angle cosine

13

## Which formula is used to determine the total reactance of a series AC circuit?

### X = XL − XC or X = XC − XL

14

## What are the formulas derived for Ohm's law used in AC?

### E = IZ and I = E/Z

15