transformers test 🤖

why is Iron used as a core in a transformer?

High permeability and low retentivity

when an electrical current flows through a wire, what is induced?

A magnetic field

What happens to the strength of that magnetic field if the wire is coiled?

It increases it

And what do we call just the coil of wire?

Helix

If you place an iron bar in that solenoid, what is gonna happen to the induced magnetic field?

It is going to increase

what part of the transformer intensifies the induced magnetic field?

The core

Which part of the Transformer carries electrical current and or voltage that induces a magnetic field? What part of that transformer is going to do that?

The primary side

Label closed core transformer

we know that, that the primary coil is what induces that magnetic field. Which part of the transformer carries electrical current or voltage that was induced by the magnetic field. That's gonna be your what?

The secondary coil

we know that with transformers, we know energy cannot be created nor destroyed, power input should equal power output 100%. But is that ever gonna happen all the time?

No because of power losses

So where does this power go? There's three types of power losses in transformers. What were the names of them?

• hysteresis

• Eddy current losses

• Copper losses

Which type of transformer electrical power losses occur in the solenoids of the transformer due to the resistance placed on the electrical current because of the coiling of the wire?

Copper losses

Which type of transformer electrical power losses occur in the core of the transformer?

• Eddy current losses

• Hysteresis

Now, which type of transformer electrical power losses are those little small, swirling currents of electricity in the core due to the changing magnetic field, what do we call that one?

Eddy current losses

I want to know what type of Transformer consists of two solenoids placed side by side with a single iron core placed in the middle of each solenoid, meaning the iron bars are not connected in this type of transformer. What is that called?

Open core

I want to know what type of Transformer consists of a continuous steel core with the primary and the secondary solenoids both wound around the center strut

Shell transformer

I want to know what type of transformer consists of a continuous steel core with the primary coil wound around the left side and the secondary coil wound around the right side. 
What is that called?

Closed core

Of those, which type of transformer is the most efficient?

Shell

transformer efficiency

just refers to how little power is lost in the production of the secondary current or the secondary voltage

where is that power going?

it could be a copper loss, it could be an eddy current loss or a hysteresis loss

Let's say if you have 100 coils on the secondary side of a transformer to every one coil on the primary side, what kind of transformer is that? voltage output will be how many times greater than the voltage input? It'll be how much is it going to go down?

So if it is a one to 100, that means that's it’s a step up transformer, voltage goes up 100 times, Amperage is going to go down 100 times

what is a unit measurement of electrical power?

Watt

so what is the purpose of the high tension transformer?

to take that bolus of electrons and shoot it over to the anode

why do you have the filament circuit Transformer?

The necessary current or amperage to heat the filament

if you have a Transformer core that is highly permeable, that means it is going to have what kind of retentivity?

Low retentivity

Why do we want a high permeability and load retentivity?

once that exposure has ended, it is desirable for that iron core to become demagnetized immediately so that current in that secondary side stops

X ray tubes have to have what kind of current to operate?

direct current

Transformers require what kind of current to operate?

Alternating current

Transformers are used to either raise or lower what?

Voltage and amperage

auto transformer

has one iron bar and one coil that is used for both the primary and the secondary windings. it is a variable turn ratio. where when you select your KVP, the tap it moves up and down, you're telling it to either step up the voltage or you're telling it to step down the voltage if you lower your kVp

Describe the what the autotransformer looks like

the bottom part of the coil that is considered the primary side, the top part of the coil is considered the secondary side

in an auto transformer, the tapit or contact replacement can be manipulated by you changing the what?

kVp

In a transformer with 100% efficiency, power input will equal power output. Is that true?

Yes

Transformer efficiency formula

Watts formula

Which side of the X-ray circuit is generally considered low voltage and high amperage?

Primary side

What refers to the ease with which a material and the magnetized?

Permeability

what do we call the ability of a material to remain magnetized?

Retentivity

Transformers operate on the principle of what?

Mutual induction

Auto transformers operate on the principle of What?

Self induction

The production of an electric current in a conductor by changing the strength of the magnetic field is called what?

Induction

what type of core is used in Transformers to reduce magnetic power loss in the transformer?

Closed core

Transformer power losses result in the production of what?

Heat

So what can be done to reduce copper electrical losses in the transformer?

reduce the resistance by making the wire diameter larger

What can be done to reduce eddy current and hysteresis electrical losses in the transformer?

we can use laminated silicon steel cores and Using a material with high permeability and low retentivity

In an auto transformer, if the contactor or Tappet is set above the primary coils, the exiting voltage will be greater or less than the incoming voltage?

Greater

when we have a transformer that the exiting voltage is greater than the incoming voltage, what kind of transformer is that?

Step up transformer

You can change the auto transformer by changing the what? How do you make the auto transformer either a step up or a step down?

Change the kVp

auto transformers operate on a variable or a fixed turns ratio?

Variable

And how do you alter that variable turns ratio?

Increase or decrease the kVp

step up and you're step down transformers, also known as regular Transformers, those operate on what, with what kind of turns ratio?

Fixed

what are the two circuits within that big X ray wiring diagram?

High tension circuit or high voltage circuit and the filament circuit

what is the bridge between the High tension circuit or high voltage circuit and the filament circuit?

Xray tube

which X ray circuit does the auto transformer belong to?

High tension circuit

which X ray circuit has a step down transformer?

Filament circuit

Voltage turns formula

Current (amps) and voltage formula

Amperage turns formula