U2 physics

the xray circuit

the property of a circuit that impedes the flow of electrons is

resistance

the flow of electrons along a conductor is

electric current

when a switch is turned on, the electric circuit is

closed

an adjustable form of a resistor is the

rheostat

the volt is the unit of measure for

electric potential

the study of electric charges in motion is

electrodynamics

to get electrons to flow along a conductor, there must be an

excess of positive charges at one end of the wire and an excess of negative charges at the other

what is the primary purpose of grounding in an electrical circuit

to protect users by safely directing excess current into the earth

a closed pathway of wires and related elements is an

electric circuit

which of the following devices allow the electricity to flow in one direction only

diode

the ability to do work because of a separation of charges is

electric potential

unit of measure for electric current

amp

which of the following devices can increase or decrease voltage by a set amount

transformer

the purpose of grounding is to

neutralize a charged object

a battery produces

direct current

which of the following does not open a circuit to keep the circuit and devices safe

resistor

electric ? is the ability to do work because of a seperation of charges

potential

current that changed direction in the conductor is

alternating current

alternating current is a type of current that flows in only one direction. A battery is a good example. T/F

false

? conducts a short circuit into a wire that trips the circuit breaker, shutting off the electricity to the circuit. this is a protective measure for all electric circuits

grounding

kilovoltage peak is abbreviated as

kvp

a device that temporarily stores charge is the

capacitor

this common electric circuit device regulates the flow of electricity through the part of the circuit where it is placed by inhibiting the flow of electrons

rheostat

the device that regulates the amount of current flowing in the circuit is the

resistor

this common electric circuit device is simply a section of special wire usually encased in glass that quickly melts if the current flow rises excessively thus opening the circuit

fuse

the device that produces electrons through a chemical reaction is a

battery

electricity is typically thought to be the same as

electrodynamics

the only adjustable transformer in the xray circuit is the

autotransformer

a transformer with 100 turns on the primary side and 50 turns on the secondary

step down transformer

the line compensator is typically wired to the

autotransformer

a step up transformer results in

increased voltage

the unit of electric potential is the

volt

a term electromagnetic induction refers to the production of

electric current

the transformers in the xray circuit operate on

AC

a step up transformer results in

decreased current

the devices that change alternating to direct current are the

rectifiers

the main power switch is found on the

primary circuit

a step down transformer results in

decreased voltage

a transformer transforms or changes electric:

voltage

the rheostat is found on the

filament circuit

the autotransformer is found on the

primary circuit

the autotransformer used in the xray circuit

contains a single coil that serves as both primary and secondary coils

the principal application of a transformer in an xray imaging system is to

change voltage

mAs is a unit of

electric current

what converts volts to kilovolts

step up transformer

the primary side of the high voltage transformer is found on the

primary circuit

the device that adjusts the incoming power supplied to the xray circuit to maintain 220 V is the

line compensator

when an electric current is induced by mutual induction the induced current flows

in the secondary coil

the device referred to as the kVp selector is the

autotransformer

when electrons move in a copper wire

resistance to the electron flow exists

the xray tube (not filaments) is found on the

secondary circuit

a difference between self-induction and mutual induction is that

mutual induction requires two coils and self induction requires only one

a step down transformer results in

increased current

the purpose of the filament circuit is to

boil electrons off the filament

if DC is applied to the primary coil of a step up transformer what is the result in the secondary coil

nothing

what current is induced in the secondary coil when mutual induction takes place

alternating

the secondary side of the high voltage transformer is found on the

secondary circuit

the filaments within the xray tube are found on the

filament circuit

a transformer with 100 times more tuns on the secondary side as compared with the primary

step up

with mutual induction to induce voltage in the secondary coil there must be

AC in the primary coil of wire

the rectifiers are found on the

secondary circuit

the autotransformer

uses self induction

given a closed loop of wire with no electron flow an electric current can be induced if

changing/fluctuating magnetic field is present

the step down transformer is found on the

filament circuit

when a step up transformer is in use

secondary voltage is greater than the primary voltage

what is the principal reservoir for excess electric charge

the earth