delmar 5

. What is the RMS value of an AC voltage that has a 480 C peak 15 RMS Values 278.72 305.76 339.46 453.53

339.46

. A right triangle has one side of 5 and another side of 4 (neither is the hypotenuse). What is the angle adjacent to the side that is 5? 14.5 10387 15.34 18.13 38.66

38.66

Multiplying like signs such as - x - produces what kind of product? Positive Negative Neutral

Positive

To measure the height of a tall building with a 1-foot ruler , a measurement can be taken by finding a relatively flat area in the open sunlight, holding the ruler upright, and measuring the Shadow Wall Height of wall Angle

Shadow

Motor leads appear to be resistive because there is a conversion of electrical energy into mechanical energy. T or F

t

1. The advantage of ________ is that less current is required to produce the same amount of power. 15-1 High-voltage transmission Low - voltage transmission High-voltage DC Low-Voltage DC

High-voltage transmission

In a right triangle, the longest side is called the Adjacent side Hypotenuse Opposite side Right side

Hypotenuse

Using the Pythagorean theorem, what is represented as "c"? Right angle Hypotenuse Length of the bottom side of the triangle Length of the left side of the triangle

Hypotenuse

. In a triangle one side is 4 feet the other side is 6 feet. What is the length of the hypotenuse? It cannot be found 26 7.2 52

7.2

. A right angle is an angle of _____. 14-1 Less than 45 45 90 Greater than 90

90

1. A rectangle is a parallelogram with _____ - degree angles. Vectors 0 180 45 90

90

At ________ frequencies, the skin effect can have a great effect on the operation of the circuit. 15-6 Low High Neutral Stable

High

. What type of load contains pure resistance? Capacitive Inductive Reactive Resistive

Resistive

. _______ loads are loads characterized by the facts that they produce heat and the current and voltage are in phase with each other. 15-4 Inductive Capacitive Resistive True Power

Resistive

. Many AC formulas are based on 14-Chapter Introduction The Pythagorean formula Parallelograms Right Triangles Right Angles

Right Triangles

Which measures magnitude only? Vector Scalar Sine Cosine

Scalar

. Once the sine, cosine, or tangent of the angle has been determined, the angle can be found by using a(n) ___________. 14-3 Oscar had a heap of Apples Pythagorean chart of angles Regular calculator Scientific calculator

Scientific calculator

. ______ waves are so named because the voltage at any point along the waveform is equal to the maximum, or peak, value multiplied by the sine angle of rotation. Sine Waves Linear Triangle Sine Cosine

Sine

The function that is equal to the opposite divided by the hypotenuse is the ______ . Cotangent Sine Cosine Tangent

Sine

What is the most common of all AC waveforms? Sine Waves Triangle Sine Pulsating Cosine

Sine

1. The ______ function is equal to the opposite side divided by the adjacent side. 14-3 Sine Cosine Tangent

Tangent

. Which person was a proponent of lighting using higher voltage AC? 15-1 Edison Watt Volt Tesla

Tesla

In a DC circuit, the product of volts times the amperes is called the ______ power. Apparent Reactive True Inductive

True

. Vectors must be added using _____ addition. 14-Vectors Triangular Vector Rectangular Pythagorean

Vector

A line that indicates both magnitude and direction is a Vectors Linear Vector Scalar Exponential

Vector

What rotates in counterclockwise direction? 14 - vector Vector Scalar

Vector

What is the unit of measure for the power delivered to the load in a DC circuit? 15-4 Hertz Volt-amperes VARs Watts

Watts

The amplitude of a waveform is measured from 15 - peak to peak and peak values Peak to peak Zero to the highest value obtained in either direction Zero to the RMS level Zero to the effective level

Zero to the highest value obtained in either direction

. Vectors are used to represent magnitude only and not directions, T or F

f

1. Both AC and DC and be transformed. 15-1 T or F

f

1. The peak-to-peak value of a sine wave is measured from the minimum value in the negative direction to the maximum value in the positive direction. Peak to Peak value and peak value T or F

f

DC loads are generally described as being resistive, inductive, or capacitive, depending on the phase-angle relationship of the voltage and current and amount of true power produced by the circuit. T or F

f

The direction is indicated by its length T or F

f

Transmission voltage of 59 Kilovolts 138 kilovolts and 345 kilovolts are common. T or F

f

. The number of cycles completed in 1 second is called a sine waves Cycle Hertz Frequency Rotation

Frequency

. A horizontal line is indicated by how many degrees? 0 45 90 180

180

. What is the average voltage of a full-wave rectified 240 V RMS AC voltage? 15-Average Values 216.17 V 252.88 V 276.32 V 332.75 V

216.17 V

1. What kind of cable is less affected by the skin effect? 15-6 Braided Copper Grounding Tungsten

Braided

1. When current flows through a(n) ______, a magnetic field is created around it. Wavelength Conductor Insulator Wavelength Signal

Conductor

. Each complete waveform of 360 is called a Sine Wave Cycle Hertz Frequency Rotation

Cycle

The conductor offers some amount of ohmic resistance to the flow of electrons, depending on the type of material from which the conductor is made, its length, and its 15-6 Time constraint Frequency Magnitude Diameter

Diameter

. To determine which side is an opposite angle, what can you do? 14-3 Use the Pythagorean formula Use the sine function Draw a line bisecting the angle "Fold" the triangle in half

Draw a line bisecting the angle

Frequency is measured in Sine Waves Watts Hertz Amperes Volts

Hertz

. When current rises and falls at the same rate as the voltage and reverses the direction of the flow when the voltage reverses polarity, the current is said to be ____ with the voltage. 15-Resistive Loads In phase Out of phase In leading phase In lagging phase

In phase

What type of AC waveform features voltage rising at a constant rate with respect to time? Trianglular Waves Cosine Linear Sine Pulsating

Linear

. What is the approximate sum of the following two vectors: Magnitude 10 @ 120 and magnitude 15 @ 90 Magnitude 20 @ 210 Magnitude 23 @ 30 Magnitude 24 @ 102 Magnitude 27 @ 210

Magnitude 24 @ 102

What is the approximate sum of the following two vectors: magnitude 20 @30 and magnitude 10 @ 60 Magnitude 29 @ 40 Magnitude 30 @ 30 Magnitude 30 @ 90 Magnitude 40 @ 90

Magnitude 29 @ 40

In a right triangle, the side across from an angle (the side is not one of the two that make the angle) is called the ______. 14-3 Adjacent side Hypotenuse Opposite Side Right side

Opposite Side

Which memory aid will help you remember the trigonometric function relationships? 14-3 Oscar had a pile of oranges. Oscar had a heap of Oranges Oscar had a pile of apples Oscar had a heap of apples

Oscar had a heap of apples

1. One method of adding two vectors that originate at the same point is the ______ method. Parallelogram Trapezoid Rectangle

Parallelogram

1. Which value is often the simplest measurement to make when using an oscilloscope? Peak to Peak Values One half peak Average RMS Peak to peak

Peak to peak

in a right triangle, the sum of the squares of the two sides is equal to the square of the hypotenuse. This was discovered by a Greek named _____. Hypotenuse Right Pythagoras Cosine

Pythagoras

. The magnitude is indicated by its angle of rotation form 0. 14 - Vectors T or F

t

1. Because the current and voltage are both either positive or negative at the same, watts is always positive. 15-5 T or F

t

1. When an AC voltage is applied to a resistor, the current flow through the resistor is a copy of the voltage with regard to time of frequency, but not necessarily in magnitude. 15-4 T or F

t

At low frequencies, the skin effect has very little effect on the resistance of a conductor and generally is not taken into consideration when computing the size wire needed for a particular circuit. 15-6 T or F

t

Some formulas can be used to find the angles and lengths of different sides with sine, cosine, and tangent formulas T or F

t

Trigonometry can provide answers to applications such as the necessity to know the height of a tall building. T or F

t

When asking for directions, you are told "Walk three blocks." This is an example of a scalar. 14 -Vectors T or F

t