Units 1-
A resistor whose valises can be varied over a range of values is called a blank resistor
Variable
What is another term for electromagnetic force (emf)
Voltage
What meter is designed to be connected directly across the power source
Voltmeter
What meter measures true power in a circuit
Wattmeter
A charge curve for a capacitor is divided into blank time Constants
5
Electrical current is the flow of
Electrons
What letter symbolizes the farad
F
In a capacitive circuit the voltage leads the current by 90 electric degrees true or false
False
The shock that results from walking across a carpet and touching doorknob is and example of a black static charge
Nuisance
What meter must never be connected to a circuit when the circuit power is turned on
Ohmmeter
The current voltage power and resistance in a series circuit can be calculated using blank law
Ohms
The unit for inductive reactants or XL is
Ohms
Circus to have more than one path of current flow are blank circuits
Parallel
There is very little resistance and a large amount of current flows in a blank circuit
Short
The voltage rating of a capacitor blank
Should never be exceeded
Exponential curves are always divided into blank time Constants
5
Three capacitors a 12 microF a 20microf and a 30 microf are connected in parallel what is the total Xc
6.42 ohms
Three capacitors a 12 F a 20f and a 30f are connected in parallel what is the total Capacitance
62 f
In the national electrical code the current carrying abilities of conductors are called the blank
Ampacities
A test meter that uses a scale and pointer to indicate values is a blank meter
Analog
The value of a resistor can often be determined by the color code. What is the color code and values
B. Black 0 B. Brown 1 R. Red 2 O. Orange 3 Y. Yellow 4 G. Green 5 B. Blue 6 V. Violet 7 G. Grey 8 W. 9 Gold 5% Silver 10%
A combination circuit is a circuit that contains blank
Both series and parallel components
Losses in the Core of iron core and doctors include blank and blank losses
Eddy current and hysteresis
Energy in a capacitor is stored as a blank
Electro static charge
Polarized capacitors are also known as blank capacitors
Electrolytic
When a conductor cuts magnetic lines of force a voltage is induced into the conductor this principle is called blank
Electromagnetic induction
The theory concerning current flow that is most widely accepted as being correct is the blank flow theory
Electron
What type of magnet depends on the flowing current to produce a magnetic field?
Electron magnet, dc current
What are the 3 principals of an atom
Electron proton neutron
In a series circuit the sum of the voltage drops is blank the applied voltage
Equal too
A voltmeter has a very blank resistance connected in series with the meter movement
High
When a magnetic field continually changes magnitude and direction of voltage is continually being induced in the coil the voltage is called blank voltage
Induced
What is the non-conductive covering around a wire
Insulation
In a pure inductive circuit the current blank
Lags voltage by 90°
In a pure capacitive circuit the Current blank the applied voltage by blank
Leads 90°
In a parallel circuit the total resistance is blank value resistor
Less than the lowest
Conventional flow theory states current flows from the most positive point to the most blank point
Negative
A junction point of current Paths is often called a blank
Node
Static electricity refers to electrons that are what
Not moving
What is the unit for capacitive reactance
Ohms
One coulomb per second is equal to one what
One amp
Inductors always blank a change in current
Oppose
Most devices such as a light receptacle at home and office buildings are connected in blank circuits
Parallel
When a capacitor is connected in a circuit with a resistor the amount of time needed to charge the capacitor is called the blank
RC time constant
What force is demonstrated in objects with like charges
Repulsion
In a series circuit the total blank is equal to the sum of the individual resistors
Resistance
The longer the conductor the more blank it will have
Resistance
What type of load contains pure resistance
Resistive
When AC voltage is rectified in converted into DC the resulting waveform is normally not pure flat DC the pulse is that occur are called
Ripples
A circuit that only has one path for current to flow is called a blank circuit
Series
And ammeter is connected in blank with the load to permit the load to limit current flow
Series
In a crane what motor goes up and what motor goes down
Series up shunt down
Rotating machines normally produce a waveform called a blank wave
Sine
The blank a fact occurs when a C in deuces eddy current into the conductor which causes the electrons to be repel toward the surface of the conductor
Skin
In a parallel circuit the total current flow is equal to the blank of the current through all the branches
Sum
How many color bands are used on resistors that have a tolerance of 20%
Three
When the current flows through and inductor stops in the current also decreases at an exponential rate a blank occurs
Voltage spike
The amount of electrical power being used in a circuit is measured in what
Watts
A series circuit has blank paths for current flow
1
And electrical circuit has a voltage of 50v and resistance of 5ohms. What is the value of current?
10 amps E=IR
Two in doctors are connected in series to a 120 V 60 Hz supply the values of the inductors are 1.5 Henry and 2.5 Henry the total inductive reactants is blank
1508 Henry
A series RC circuit contains two resistors and two capacitors the resistor's are 82 ohms and 47 ohms the capacitors have a capacitive reactance of 80 ohms and 50 ohms what is the total impedance
183.14 ohms
What is the applied voltage in a series circuit with two resistors of 25 V and 60 V respectively
85 volts
What is a device that opposes a change of voltage
A capacitor
To test wire insulation a special type of ohmmeter called a blank is used
A megger
When a capacitor is connected to a blank circuit current appears to flow through the capacitor
AC
A point that is used as a common connection for other parts of a circuit not actually driven into the ground is called a blank ground
Chassis
When is circuit has only one pass the blank is the same at any point
Current
Each complete way form of 360° is called a blank
Cycle
If an object is placed in a field of a strong electromagnet connected to an AC line, the object will be blank
Demagnetized
A voltage blank is used to provide different voltages between certain points in a circuit
Divider
True or false. During normal operation of a typical 120 volt appliance circuit, current flows through the hot, grounding, and neutral conductors
False
What is the basic unit of capacitance
Farad
Magnetic lines of force are referred to as
Flux
The number of cycles completed in one second is called a
Frequency
What device is designed to open and disconnect a circuit in the event of excess current
Fuse
What color color multiplier means to divide the combined first two numbers by 10
Gold
The neutral conductor is also referred to as the blank conductor
Grounded
What is the unit of measurement for inductance
Henry
Frequency is measured in
Hertz
When current rises and falls at the same rate as the voltage in reverse is the direction of flow in the voltage reverse polarity the current is said to be blank with the voltage
In phase
Increasing the surface area of the plates will cause the capacitance of a capacitor to blank
Increase
The maximum points of a waiver form is called the
Peak
The measure of a material's ability to be magnetized is called
Permeability
A capacitor is constructed by separating to metal conductors known as blank with an insulating material known as blank
Plates dielectric
By observing the direction of current flow through the circuit voltage blank can be determined
Polarity
What is another term for a variable resistor
Potentiometer
The time required for current in an inductor to reach its full ohms law value is called the blank time constant
R-l
Basic law of physics states that like charges blank and opposite charges blank
Repel, attract
In a DC circuit the product of volts time is the amperes is called the blank power
True
True or false A grounding conductor helps prevent a shock hazard in the event that am ungrounded, or hot, conductor comes in contact with a case or frame of an appliance
True
True or false. Earth contains magnetic poles
True
Power factor PF is the ratio of the blank power to the blank power
True apparent
Direct current is described as
Unidirectional
Of the different power values in a RC circuit which is known as apparent power
VA
The power in a capacitor is reactive power what is the unit for reactive power
VAR
The symbol for reactive power is blank
VARS
Alternating current is described as
bidirectional
What meter measures resistance
ohm meter
What force is demonstrated in objects with unlike charges
Attraction
The unit of resistance to current flow is the
Ohm
In parallel circuits the voltage drop across any branch is the same as blank
The applied voltage
What is indicated by the fourth band on a 4 band resistor
Tolerance, explain all Bands
What is the symbol for capacitive reactance
Xc
The symbol for inductive reactants is
Xl
The amplitude of a waveform is measured from
Zero to the highest value obtained in either direction