Terms  Definitions 

Selenium is a... 
Semiconductor

Resistance is measured with a(n) 
ohmmeter

Piezoelectricity refers to electricity produced by some materials when they are subjected to 
pressure

When resistors are manufactured, the processes are not perfectly exact. Each resistor may be slightly different from the next one. The plus and minus limits of a resistor's ohmic value is called 
Tolerance

Finding the values of voltage, current, resistance, and power in a series circuit can be found by using ___ law 
Ohm's

Reading current without being required to connect the meter in series in the circuit is often desirable. This can be done using a ___ ammeter 
clampon

A voltmeter has a ___internal resistance 
high

The nonconductive covering around a wire is the 
insulation

The measurement of the specific gravity of an electrolyte in a secondary cell is done with a device called a(n) 
hydrometer

The most common method of producing electricity is through the use of 
Magnetism

Valence electrons are contained in the ____ shell 
Outermost

In a parallel circuit, the voltage drop across any branch is the same as the ____ voltage 
applied

In a parallel circuit, the total current flow is equal to the ____ of the currents through all the branches 
Sum

The meter that measures power is the 
wattmeter

In the National Electrical Code, the current carrying abilities of conductors are called 
ampacities

An ammeter has a ___ internal resistance 
low

The ampacities listed in the tables are based on a specified ambient temperature. If conductors are to be operated in a different ambient temperature than the temperature specified, a ____ factor must be applied 
correction

As a conductor diameter is changed, the circular mil area will change. If a conductor diameter is changed so that the circular mils double, the conductor resistance will 
halve

The leadacid batteries used in automobiles are made with an electrolyte containing 
sulfuric acid

In 1800 Alessandro Volta was experimenting with producing electricity and created the first battery constructed of individual cells connected together, which he called a 
voltaic pile

In an electrical circuit, the voltage is 50 volts and the resistance is 5 watts. What is the value of current? 
10 A

Resistors which only have one ohmic value called 
Fixed resistors

A threeresistor circuit has a total power of 25 W. Two of the resistors dissipate 10W and 5W respectively. How much power does the third resistor dissipate? 
10 W

An increase in ____ results in an increase of load in a parallel circuit 
Current

In a parallel circuit, the total resistance is always ___ resistance of the lowest value resistor 
Less than

In a series circuit, all voltage drops across all the resistors are ____ to determine the voltage applied to the circuit 
Added

A meter movement that uses the taut band suspension and operates on very tiny amounts of current is often called a 
galvanometer

The "ambient air temperature" that is considered in relation to a conductor ampacity is the temperature of the 
surrounding air

In order for ammeters to read currents higher than the meter movement maximum current, a ___ is connected in parallel with the meter movement 
shunt

On a _____, it is necessary to readjust the meter to zero when the scale is changed 
ohmmeter

In a secondary cell, an electrolyte can be checked to ensure that it has correct chemical composition by measuring its 
specific gravity

When a oneloop generator's speed of rotation is increased, the conductor cuts more lines of flux per second, resulting in a higher 
induced voltage

A battery can have two voltage ratings, one measured with no load and one measured at normal load. This is because the battery has 
internal resistance

A thundercloud can obtain ____ and ____ charges 
Positive and negative

Short circuits generally cause a ____ to blow, or a ____ to open 
Fuse; circuit breaker

A resistor has color bands of brown, black, red, and silver. What is the resistance and tolerance of the resistor? 
100W, 10%

Within a lightning bolt, current always flows 
From negative to positive

The atomic number of an element is the number of ____ in the nucleus 
Protons

A parallel circuit composed of a 10 ohm and a 22 ohm resistor. It has a supply voltage of 60 V. What is the current in the 10 ohm resistor? 
6 A

In a series circuit the current is ____at any point in the circuit 
The same

"The algebraic sum of the currents entering and leaving a point must equal zero" is which law? 
Kirchhoff's current law

As leadacid batteries age, they may lose some of their capacity. To load test a battery, a load of THREE TIMES the amperehour rating is connected to the battery. The voltage is monitored and after _____, the voltage should be above ___% of the terminal 
3 minutes; 80%

If current is flowing in a circuit containing an inductor and the power switch is opened, it is possible that a ____ may be created 
voltage spike

The plate metals used in a battery are chosen based on how easily one metal will give up electrons compared to the other metal. A list of metals showing their willingness to accept or receive electrons is called the _____ series of metals 
electromotive

Each cell of a nicad battery creates ____ volts, resulting in a six cell battery having a terminal voltage of ___ volts 
1.2V; 7.2V

The toner in a copy machine sticks to the drum in areas that... 
Are charged

In a combination circuit, how should one identify the series and parallel elements? 
Trace the current path

A piece of wire that is 0.001 inches in diameter and 12 inches long is 
one milfoot

If a magnesium atom combines with two chlorine atoms, the result is 
a metallic salt

The most accepted theory as to why current flows is 
The Electron Flow Theory

Wires of different sizes are labeled with respect to their diameter. The identifying scale that is used is the __ scale (formerly known as the Brown and Sharpe scale). 
AWG scale (American Wire Gauge)

When DC is applied to a coil, the rate of current increase is described by a(n) 
exponential curve

If a thundercloud has a positive charge, the current in the lightning bolt will in what direction? 
From the earth to the cloud

A coil has an inductance of 3 H and a wire resistance of 15 W. How long will it take for the current to reach its full value? 
1.0 seconds

The three formulas used to determine resistance in a parallel circuit are called 
Resistors of Equal Value, Product Over Sum, Reciprocal Formula

When a cell cannot be recharged by design, it is due to 
a chemical reaction which causes the electrodes to be eaten away

If a voltage is being induced into a conductor by electromagnetic induction, reversing the direction of motion of the conductor will 
reverse the polarity of the induced voltage

In a circuit, three wires form a junction. the current in one of the wires is 
the sum of the currents in the other two wires; and the difference between the currents of the other two wires

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