Rad 114 Lecture Exam 1 OCC

Calculate the power in a circuit with 110 volts and 120 amperes

ionization chamber AEC measures radiation by

modern x-ray tubes operate mostly on ____ current

The turns ratio of a step-up transformer is

to induce a current to flow, what three variables must be present?

Lenz discovered that pushing the north pole of a magnet into a coil wire will

purpose of photomultiplier tube is to

the cathode of a photomultiplier tube produces electrons when it is struck by

Oersted is credited with the discovery of the

Induction is form of electrification by interacting electromagnetic fields & conductors used by

The process of changing alternating current to pulsating direct current is termed

The resistance of a conductor increases as ___

important aspects of using AEC is the techs ability to

Calculate the power in a transformer utilizing 220 volts and 20 ohms or resistance

According to ohm's law, the voltage across a circuit or and indiv. circuit element is equal to

credited w/ discovery that electric current will flow if conductor is in changing magn field is

The type of current that flows through a circuit in one direction only is

The unit of electrical current is ___ and can be abbreviated with the letter __.

a semiconductor

Calculate the total R of a series circuit with indiv. resistances of 6, 8, 12, & 24 ohms

the purpose of a step-up transformer is to

In electrodynamics, current is a measurement of _____ in a circuit.

modern x-ray transformers operate mostly on ___ current

The component of the x-ray tube that heats up from resistance to amperage is the _____

full rectification of a three-phase, six-pulse x-ray generator will require ___ rectifiers

The type of current that changes directions in a sequence with time is

___ is the amount of time the automatic timers need to respond to the radiation exiting the PT

most efficient design of an iron core transformer is the _____ type

The purpose of a transformer is to?

Solid state AEC devices

autotransformers operate on the principle of

which of the following expresses the turns ratio of a transformer?

___ is the force that causes electrons to flow on the outside surface of a conductor

premature termination of the automatic exposure my result by

full rectification of a single-phase x-ray generator will require ____ rectifiers

Calculate total resistance of a parallel circuit w/ individual resistances of 6,8,12,&24 ohms

The tech will adjust this factor when the PT is larger or smaller than average

voltage produced in the secondary side of a step-up transformer is directly proportional to

A vacuum tube diode has

this type of AEC device has smaller and thinner detecting chambers to sense remnant radiation

changing the negative alternating pulse to positive is termed

in circuits a component that reduces flow of electrons is identified by its _, & measured in __

The term used to describe how much heat a tube and its components can withstand is ______

Chart that lets user know when highest technical factors may be used for a single exposure is

density controls for AEC should not be used

iron cores inserted in the construction of a transformer serve to

when using an automatic exposure device, tech selects all of the following except for

Current flows on the secondary coil of the transformer because of

What is the formula for Ohm's law?

incoming power from the electric company to an x-ray machine is ____ current

The component on the x-ray tube that keeps the stream of electrons narrowed is the ______

which of the following is a disadvantage of a valve tubes rectifier

transformers use ______ current to operate

suppressing negative pulse of the alternating current using only x-ray tube itself is termed