Electricity, Magnetism, Electromagnetism
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| Primary function of an x-ray imaging system is to convert eletrical energy into _______energy. | electromagnetic
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| Unlike charges ____ and like charges ____. | attract; repel
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| Coulomb's Law states that electrostatic force is ___ proportional to the product of the electrostatic charges and ____ proportional to the square of the distance between them. | directly; inversely
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| Electric charge distribution is ____ throughout or on the surface. | uniform
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| Electric charge of a conductor is concentrated along the _____ curvature of the surface. | sharpest
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| _____ is the movement of electrons. (electrons moving from one cloud to another) | Induction
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| Electrification can be created by ___, ___, or ____. | contact; friction; induction
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| The smallest unit of electric charge is the _______. | electron
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| 1 coulomb is equal to | 6x10 to the (18th) electron charges
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| Rubbing a balloon on a wool sweater is an example of _____. | friction
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| ____ occurs when two objects touch and electrons are transfered between objects. | Contact
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| The unit of electric potential is the ____. | volt (V)
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| __________ is the study of electric charges in motion. | Electrodynamics
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| A ____ is any substance through which electrons flow easily. | conductor
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| ____, ____ and ____ are three types of insulators. | Glass, clay/earthlike materials, rubber
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| A _______ is a material that under some conditions behaves as an insulator and in other conditions behaves as a conductor. | semiconductor
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| The ____ is proportional to the number of electrons flowing in the electric circuit. | ampere
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| Increasing electric reistance results in a _____electric current. | reduced
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| What is Ohm's Law? | V=IR (volts=electric current x electric resistance)
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| Resistance (R) is measured in ____. | ohms
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| Electric current is measured in ____. | amperes (A)
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| _______ is a sine (sinusoidal) curve. | Waveform
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| _____ is identified as a 60 hZ current (___ - HZ in the rest of the world). | AC; 50
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| In a ____ ______, electrons can be made to flow in one direction along the conduction. | direct current (DC)
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| In a ___ _____, electrons oscillate back and forth. | alternating current (AC)
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| A ____ circuit contains elements that are connected at their end rather than lying in a line along a conductor. | parallel
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| Electric power is measured in ____. | watts (W)
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| In an electric circuit, a ____ will inhibit the flow of electrons. | resistor
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| The current through out an entire circuit is ______. | constant
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| What is the electric power formula? | P=IV
P= power in watts
I=current in amps
V= electrical potential in volts
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| Electrical power is measured in _____. | Watts (W)
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| Any charged particle in motion creates a _____ ____. | magnetic field
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| _______ objects can be made into magnets by induction. | Ferromagnetic
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| An accumulation of atomic magnets with their dipole aligned creates a ____ domain. | magnetic
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| The magnetic field is _______ by electron pairs. | neutralized
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| The iron core greatly increases the ______ of the magnetic field. | intensity
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| What are examples of nonmagnetic states of matter? | wood, glass
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| What are examples of diamagnetic states of matter? | water and plastic
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| What is an example of a paramagnetic state of matter? | gadolinium
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| What are examples of ferromagnetic state of matter? | iron, nickel or cobalt
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| ______ has low magnetic susceptibility; ____ has high magnetic susceptibility. | Wood; iron
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| The SI unit of magnet field strength is the ____. | tesla
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| One tesla (T) = ______ gauss (G). | 10,000
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| Like magnetic poles ____ and unlike poles ____. | repel; attract
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| The magnetic force is ______ to the product of the magnetic pole strengths divided by the square of the distance between them. | proportional
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| A coil of wire is called a ____. | solenoid
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| If an electric potential is applied to objects such as copper wire, this would be termed ____ ____. | electric current
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| The insulator confines the electron flow to the _____. | conductor
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| An object is said to be _______ if it has too few or too many electrons. | electrified
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| Theoreticaly, electrons move from _____to _____. | negative; positive
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| Resistance is dependent on 4 things: | material, length, diameter and temperature
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| The unit for resistance is ____. | ohms
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| Theoreticaly, electrons move from _____to _____. | negative; positive
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| Resistance is dependent on 4 things: | material, length, diameter and temperature
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| Examples of insulators are ____ and ____. | rubber; glass
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| The unit for resistance is ____. | ohms
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| An example of direct current is a _____. | battery
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| The formula for ohms law is: | V=IR
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| Examples of insulator are ____ and ____. | rubber; glass
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| Examples of a semiconductor are ___ and ____. | silicon; germanium
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| Examples of conductors are ___ and ____. | copper; aluminum
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| Examples of superconductors are ___ and ___. | niobium; titanium
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| A _____ circuit contains elements that are connected at their end rather than lying in a line along a conductor. | parallel
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| The increased heat of a wire will _____ conduction. | decrease
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| _____ is the best material to conduct electricity. | Copper
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| The increased length of a wire will ____ conduction. | decrease
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| An increase in diameter will ____ conduction. | decrease
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| The unit for electron potential is ______. | volts
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| _____ is a material that under some conditins behaves as an insulator and in other conditions behaves as a conductor. | semiconductor
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| An example of AC is a _____. | generator
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| Two types of magnetic fields: | bipolar and dipolar
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| A _____ changes the intensity of alternating voltage and current. | transformer
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| _______ turn mechanical energy into electrical energy. | Generators
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| What is the Transformer Law? | Vs/Vp=Ns/Np
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| What is the Transformer Law Effect on Current? | Is/Ip=Np/Ns
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| Step up generator increases voltage and _______ amperage. | decrease
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| Step down generator will decrease voltage and _______ amperage. | increase
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| What is the formula for turns ratio? | Turns Ratio = Ns/Np
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