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156 magnetics & Emag
| Question | Answer |
|---|---|
| What is the inverse square law | The intensity of electromagnetic radiation diminishes over distance. This is an application of this rule |
| Has the ability to block Magnetic Fields | Nothing |
| Photons exhibit this type of behavior | Wave Particle duality |
| A form of energy that originates from the atom? | Electromagnetic radiation |
| The study of stationary electric charges | Electrostatics |
| The velocity of x-ray photons | Speed of light or 3x10^8 |
| The only difference between x-rays and gamma rays is this | Their origin |
| This causes electrons to move in a conductor | Potential difference (voltage) |
| Has the ability to block magnetic fields | Nothing |
| What is the unit of electrical power | Watts |
| What law states that the resistance in a circuit is equal to the voltage divided by the current? | Ohmz Law |
| The lowest energy range of the electromagnetic spectrum | Radiowaves |
| EM radiation is measured using what term | Hertz |
| Gamma rays are produced in the ____ of the atom | Nucleus |
| The energy of a photon is directly proportional to its | Frequency |
| The unit of electric potential | Volt |
| The flow of electrons in a conductor | Current |
| Electrons that flow in only one direction represents this condition | Direct current (DC) |
| The smallest quantity of any type of electromagnetic energy | Photon |
| What is the equation for the velocity of all electromagnetic radiation? | 3x10^8 ms |
| What are the three wave parameters needed to describe electromagnetic energy? | velocity, frequency, and wavelength |
| Materials that are weakly repelled by either magnetic pole. | Diamagnetic |
| Adding an iron core to a magnetic field will do this | Induce or intensify the magnetic field |
| The unit of measure for magnet field strength | Telsa |
| Transformers operate on this type of current? | Alternating current |
| What is the potential difference in terms of x-ray control panel | kVp |
| This does not covert one form of energy to another but changes electrical potential and current into higher and lower intensity | A Transformer |
| The most efficient type of transformer | Shell type |
| The flow of electrons in a conductor | Current |
| Electrons can flow through or on one of these | Conductors |
| The Ampere is also known as this | Current |
| V = IR | OHMz Law |
| Plastic, Rubber and Glass are types of | Insulators |
| These materials posses the ability to conduct and insulate | Semi conductors |
| Material used, the length, the cross-sectional diameter and temperature | What are the factors affecting resistance? |
| Device used to convert electrical energy into mechanical energy | What is a motor |
| A step up transformer will do this | increase voltage and decrease current |
| According to Ohm’s law, what would the voltage be if the resistance is 8 ohm and the current is 16 ampere | 128 |
| According to Ohm’s law, what would the resistance be if the voltage is 220 volt and the current is 30 ampere | 7 |
| 5 ohm, 6 ohm and 4 ohm resistors connected in series would result in a total resistance of how many ohms | 15 |
| A step-up transformer works on this principle | Mutual induction |
| AC or DC will cause inductance | AC |
| Electromagnetic induction requires a conductor and this | a changing magnetic field |
| Another name for magnetic lines | Flux lines |
| This is present around all electrical currents | A magnetic field |
| According to the right hand thumb rule, which direction would the magnetic field be if the current is moving toward you | Counter clockwise |
| Parallel resistors of 2 ohm, 6 ohm, and 7 ohm would result in a total resistance of how many ohm | 1.23 Ohm |
| Based on electrostatics and potential difference, electron flow means electrons do this | Flow from negative to positive |
| Electrons move from areas of _______ to _____ concentration. | Highest and lowest |
| Friction, Contact and Induction are methods of this term | Electrification |
| Process of charging an object by adding or subtracting electrons | Electrification |
| Study of fixed electric charges or charges at rest | Electrostatics |
| Study of fixed electric charges or charges at rest | Silver Au |
| The measurement of electromotive force (EMF), ie. Pushing | Volt |
| This type of material is weakly repel by a magnetic field | Diamagnetic |
| These three things affect differential absorption | Atomic #, mass density of tissue and x-ray energy (kVp)? |
| Characteristic x-rays, an ionized atom and a photoelectron are by products of this | photoelectric absorption |
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Rhonjoh2979
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