Energy & Electricity Flashcards

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1
Q

Where is the Binding energy in the electron shell greatest

A

In the inner shell, resulting in higher energy photons when they are ejected during characteristic radiation production

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2
Q

Why is characteristic radiation discrete energy?

A

The target on the anode is pure Tungstun and the K shell binding energy of Tungsten is consistent resulting in a monoenergetic characteristic

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3
Q

All ionization ratiation has a wavelength of what?

A

less then 1 nanometer

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4
Q

what has the shortest wavelength?

A

Therapeutic radiation

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5
Q

order of decreasing energy of radiations?

A

therapeutic xrays
gamma rays
x rays

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6
Q

The shortest wavelength non ionizing electromagnetic waveform is?

A

UV rays which has the greatest penetrating power

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7
Q

what is the smallest particle of electromagnetic radiation?

A

photon

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8
Q

What is the name when photons travel in groups?

A

quanta of radiation

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9
Q

What is amplitude?

A

the height of the wave from baseline

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10
Q

frequncy

A

the number of complete waves per unit time

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11
Q

wavelength

A

the distance between adjacent of two peaks

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12
Q

what does wavelength determine?

A

frequency

shorter wavelength= higher frequency

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13
Q

velocity

A

Speed at which wave travels

always the speed of light for EM radiation

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14
Q

Electrical current

A

in the USA it is AC current flos at 6- cycles per second in a sine wave form

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15
Q

Half Wave

A

AKA half wave rectified is a 60 cycle/sec electricity

Using only the - to + wave, ignorning and not using the + to - half of the wave

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16
Q

Fully rectified

A

using both the - to + and a flipped version of the + to - half of the cycle resulting in 120 pulsees per second

17
Q

Tri-phase

A

uses three 60 cycle/second waves in phase, fully rectified resulting in 360 pulses/second

18
Q

High frequency tranformers use what type of wave?

A

Use single phase waves that are squared off by capacitors that discharge during exposure which fill gaps between waves

19
Q

When does the square wave form?

A

Forms when fully rectified have no appreciable interpulse gap nearly peak average energy when fully rectified

20
Q

What do Diodes in the circuit prevent?

A

Prevent reversal of current flow during use

21
Q

how do we invert the lower half of the electricity sine wave?

A

Diodes