Flashcards in NAVEDTRA 14173A, NEETS Mod. 1, Ch.3 Deck (50)
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1
What is any device called in which an electrical current flows and which changes this electrical energy into a more useful form?
Load
2
Which device furnishes the electrical energy used by the load?
Source
3
What permits control of the electrical device and interrupts the current delivered to the load?
Switch
4
What is the technician’s main aid in troubleshooting a circuit in a piece of equipment?
Schematic Diagram
5
Who proved by an experiment that a precise relationship exists between current, voltage, and resistance?
George Simon Ohm
6
What is current inversely proportional to?
Resistance
7
What is a basic tool used to solve electrical problems?
Algebra
8
What can be constructed to easily analyze a circuit?
Graph
9
Which axis on a graph is known as the X-AXIS?
Horizontal
10
What is the rate at which work is being done referred to as?
Power
11
What unit is electric power rate measured in?
Watts
12
What is the basic unit of power?
Watt
13
What indicates the rate at which devices convert electrical energy into another form of energy?
Power rating
14
In most circuits, the actual power used by a resistor is considerably less than the power rating of the resistor because a safety factor of what percent is used?
50%
15
When resistors with wattage ratings greater than how many watts are needed, wirewound resistors are used?
5
16
Wirewound resistors are made in values between 5 and how many watts?
200
17
Which electrical device property is the ratio of power converted to useful energy divided by the power consumed by the device?
Efficiency
18
How many watts are required to equal one horsepower?
746
19
What is a complete conducting pathway called?
Electric circuit
20
Which type of circuit contains only one path for current flow?
Series
21
Each of the resistors in a series circuit consumes power which is dissipated in the form of what?
Heat
22
The total resistance of a series circuit is equal to the sum of the what?
Individual resistances
23
Which resistor value is the voltage drop across a resistor in a series circuit proportional to?
Ohmic
24
What year did G. R. Kirchhoff extend the use of Ohm’s law by developing a simple concept concerning the voltages contained in a series circuit loop?
1847
25
Which law states that "The algebraic sum of the voltage drops in any closed path in a circuit and the electromotive forces in that path is equal to zero."?
Kirchhoff’s voltage law
26
What are emf sources that would tend to force current in opposite directions said to be?
Series opposing
27
What is an arbitrarily chosen point to which all other points in the circuit are compared?
Reference point
28
Which term is used to denote a common electrical point of zero potential?
Ground
29
What is the common ground for the many electrical circuits in most electrical equipment?
Metal chassis
30
