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RAD 156 Week 4
| Question | Answer |
|---|---|
| The potential difference (voltage) is equal to the current (amperes) multiplied by the resistance | Ohm’s Law |
| Ohm’s Law Formula | V = IR |
| V = | Potential difference (voltage) |
| I = | Current (Amperes) |
| R = | Resistance (Ohms) |
| The longer the conductor, the farther electrons must travel, so | Resistance Increases |
| A shorter conductor has | Less Resistance |
| A ______ gives electrons more room to flow, reducing resistance | Thicker Wire |
| A _________ restricts the flow and increases resistance | Thinner Wire |
| Lower temperatures reduce atomic vibration, | Decreasing Resistance |
| Higher temperatures make atoms vibrate more, making it harder for electrons to move, | Increasing Resistance |
| Natural Radiation is about- | 49% |
| Manmade Radiation is about- | 51% |
| Largest natural radiation source | radon and thoron gases |
| Largest manmade radiation source | medical imaging, with CT being the highest |
| What is Maxwell’s Electromagnetic Theory? | Electric and magnetic fields are interconnected and propagate through space as waves traveling at the speed of light |
| height of the wave from the centerline to the crest (or to trough) | Amplitude |
| The relationship between wavelength and frequency is | Inverse |
| What is Plank’s Quantum Theory? | EM photon energy is directly proportional to EM photon frequency • If you divide x-ray photon energy by the frequency of the photon, you always get the same number |
| Intensity and SID have an ________ Relationship | Invserse Square |
| Which parts of the EM spectrum are ionizing? | X-Rays, Gamma Rays |
| X-rays: originate | Through interactions involving electrons outside the nucleus |
| Gamma rays: originate | Inside the nucleus when an excited nucleus releases excess energy as a gamma-ray photon and transitions to a lower-energy state |
| _________ can do significant damage in its path | Alpha Particles |
| ELECTRIC POTENTIAL DIFFERENCE- | Determines the force of electron travel (electron speed & x-ray penetrability) Measured in volts, exists with no current |
| Volts- | Unit of electric potential, ratio of energy to electric charge. Represents the energy in a circuit |
| Current- | The rate at which electric charge flows through a conductor |
| Operates on the principle of self- induction | Autotransformer |
| Operates on the principle of mutual induction | Step Up/Down Transformers |
| Resistor is attached to the | Step Down Transformer |
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