Test 2 Bishop 2nd year

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Which Scientist discovered that a magnetic field always surrounds a conductor in which an electric current is flowing?

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The Magnetic Field will only exist around a wire while the electric current _________ flowing.

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No Electric Current = No Magnetic Field

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The Magnetic Field collapses when the current is __________________.

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If the switch is ____________, there will be no current.

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If the switch is _____________, there will be a current flowing.

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Magnetic Field lines form ______________ around the wire.

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The closer to the wire, the _____________ the Magnetic Field.

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If the wire is a loop, the Magnetic Field lines are concentrated (strongest) on the ____________ of the loop.

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If you stack many loops together (coil) with an electric current flowing, the Magnetic Field ______________.

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A coil of wire with an electric current is a _______________.

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The Magnetic Field can be intensified further by wrapping a coil of wire around a _________________ material.

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The majority of the magnetic field lines are ____________ the coil.

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"The Magnetic Field can be intensified further by wrapping a coil of wire around a ferromagnetic material (iron)". This is considered _____________________.

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A(n) ________________ is a current-carrying coil of wire wrapped around an iron-core, which intensifies the Magnetic Field.

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A Solenoid can be used as a remote control magnet.

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In Radiography, a _______________ is used as a tube stand lock and bucky tray lock.

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When you open and close a switch an electric current starts and ______________.

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What did Faraday want to prove?

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Faraday concluded that an electric current _________ be induced by the presence of a magnet.

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When a magnet is in motion, the intensity changes, an electric current is ________________.

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The changing of the Magnetic Field to produce an electric current is _______________________.

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Electromagnetic Induction is AKA ______________________ law.

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The basis of Faraday's Law was that ____________ Magnetic Field intensity induces an electric current.

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The magnitude of the induced current depends on four factors. The strength of the magnetic field is one of them.

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Select the following factors that induce the magnitude of the current:

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Electric Motors and Generators are NOT good examples of Oersted's and Faraday's Laws.

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In Radiography, an electric induction motor is used to _____________________.

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Within the Electric motor, what is considered the "Fixed Electromagnetic's"?

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The Electric Motor is a good example of __________________ Law(s).

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Within the Electric Motor, what is considered "copper bars and iron core"?

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_______________________ is supplied to the AC induction motor.

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In an AC induction motor the EXTERNAL Magnetic Field is supplied by an _________ number of fixed electromagnets called a stator.

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A ___________ is placed inside this arrangement of stators as the armature.

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The AC current supplying one opposite pair of coils is ___________ phase with the current supplying the next pair of coils.

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In the production of diagnostic x-rays, it is necessary to ______________ the incoming line voltage of 110 or 220 into the kilovoltage range.

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A transformer does convert one energy to another.

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Electric Potential AKA ____________________.

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Current AKA ____________________.

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A Transformer transforms electric potential (voltage) and current (flow of electrons) into higher or lower intensity.

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A transformer changes the intensity of alternating __ and _.

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Consider an electromagnet with a FERROMAGNETIC core bent around so that it forms a continuous loop.

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Transformers.
There are no end surfaces from which the field lines can escape.

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Transformers.
The __________________ tends to be confined to the loop of the magnetic core material.

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Another coil wound around the other side of the loop of core material.

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Will the Magnetic Field produced by the PRIMARY coil pass through the center of the SECONDARY coil?

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A good _____________ is created between the magnetic field produced by the primary coil and the secondary coil.

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The PRIMARY (input) coil is supplied with ____________________. *Establishing a magnetic field around the coil.

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Which coil is responsible for establishing a magnetic field around the coil?

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The Primary Magnetic Field will cut the __________________ coil and induce an Electromagnetic Field (EMF) and alternating current (AC).

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A changing current in the primary coil induces a changing current in the secondary coil.

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A Transformer will operate only with changing current, ________________________.

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The transformer is used to change the magnitude of _____________ and current in an AC circuit.

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The change in voltage is _____________ proportional to the ratio of number of turns (winding's) of the secondary coil (Ns) to the number of turns in the primary coil (Np).

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Voltage is induced in each of the turns of the _________________ coil.

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Turns Ratio:

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Secondary coil turns are 10 times more than the Primary coil turns.

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The turns ratio is part of the _________________ Law Formula.

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What is the Transformer Law?

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A step-up transformer ____________ the potential difference.

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A step-up transformer will have a turn ratio greater than ___________.

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Does a step-up transformer have more turns in the secondary coil or primary coil?

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Step-Up transformer:
_________________ EMF (voltage)

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Step-Up transformer:
________________ current

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Step-Up transformer:
___ is doubled, is halved.

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A Step-Down transformer _________________ the potential difference.

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A Step-Down transformer will have a turn ratio of less than ___________.

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With the Step-Down transformer there are more turns in the __ coil than the _ coil.

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Step-Down Transformer:
________________ EMF (voltage)

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Step-Down Transformer:
__________________ current

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Step-Down Transformer:
_____ is halved, _ doubles

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In a Step-Up transformer, the current on the secondary side is ______________ than the current on the primary side.

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In a Step-Down transformer, the secondary current is _____________ than the primary current.

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According to ______________'s Law, Voltage and Current are inversely proportional.

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The # of transformer turns and induced amperage must also be inversely proportional.

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The Effect of Transformer Law on Current may be written as:

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A _________________-core transformer consists of heavily insulated coils wound around a square or circular iron core.

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The ___________________ core is not a single piece but rather built up of laminated layers of iron.

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Laminated layers help reduce ______________ loses, resulting in greater efficiency.

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An AUTO-TRANSFORMER consists of an iron core with ____________ winding wire around it.

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The single wire on the AUTO-TRANSFORMER acts as __________________.

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Which transformer operates using self-induction?

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Autotransformer:
Connections are made at ___________ points on the coil for both the primary and secondary sides.

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Autotransformers are usually larger than regular transformers.

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Autotransformers are generally used when a ___________ step-up or step-down in voltage is required.

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A _______________ transformer consists of a laminated silicon steel core with two rectangular holes and a central section.

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The insulated coils on a Shell-Type transformer are wound around the ________________ section of the core.

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Shell-Type Transformer:
Insulated coils are wound around the central section of the core to __________ the distance magnetic flux has to travel between the two coils.

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A Shell-Type Transformer reduces the distance the magnetic flux has to travel and therefore decreases the leakage flux.

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Which transformer is the most currently used type of transformer?

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Which transformer is more efficient?

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The effectiveness of _____________ induction is increased with Shell-type Transformer.

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Quiz on Test 2 Bishop 2nd year, created by Analisa Olivarez on 03/10/2016.

Test 2 Bishop 2nd year

Test 2 Bishop 2nd year

Which Scientist discovered that a magnetic field always surrounds a conductor in which an electric current is flowing?

The Magnetic Field will only exist around a wire while the electric current _________ flowing.

No Electric Current = No Magnetic Field

The Magnetic Field collapses when the current is __________________.

If the switch is ____________, there will be no current.

If the switch is _____________, there will be a current flowing.

Magnetic Field lines form ______________ around the wire.

The closer to the wire, the _____________ the Magnetic Field.

If the wire is a loop, the Magnetic Field lines are concentrated (strongest) on the ____________ of the loop.

If you stack many loops together (coil) with an electric current flowing, the Magnetic Field ______________.

A coil of wire with an electric current is a _______________.

The Magnetic Field can be intensified further by wrapping a coil of wire around a _________________ material.

The majority of the magnetic field lines are ____________ the coil.

"The Magnetic Field can be intensified further by wrapping a coil of wire around a ferromagnetic material (iron)". This is considered _____________________.

A(n) ________________ is a current-carrying coil of wire wrapped around an iron-core, which intensifies the Magnetic Field.

A Solenoid can be used as a remote control magnet.

In Radiography, a _______________ is used as a tube stand lock and bucky tray lock.

When you open and close a switch an electric current starts and ______________.

What did Faraday want to prove?