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Chapter 4 Test Guide
Basic Physics for Radiography
| Question | Answer |
|---|---|
| Which of the following would be considered a basic form of matter? | 1. Solid & 2. Liquid |
| The quantity of matter that makes up any physical object is called the: | mass |
| Which of the following is located in an orbit around the nucleus of an atom? | Electron |
| Which of the following has negative (-) electrical charge? | Neutron |
| Which of the following are considered fundamental particles of atom? | 1. Neutrons & 3. Protons |
| When a neutral atom gains or loses an electron, the atom is said to be? | Ionized |
| Mechanical energy can be classified as either kinetic energy or: | Potential energy |
| X-rays consist of: | Electromagnetic energy |
| X-rays with greater energy have a shorter _____ and are more penetrating. | Wavelength |
| Of the following types of electromagnetic energy, which has the shortest wavelength? | Diagnostic rays |
| Which of the following are accurate statements regarding the characteristics of x-rays? | 1. They are highly penetrating and invisible. 3. They travel in straight lines at the speed of light. |
| The smallest possible unit of electromagnetic energy is the: | Photon |
| The term for a continuous path for the flow of electrical charges from the power source through one or more electrical devices and back to the source is: | Electrical circuit |
| The common unit of measure for the potential difference across an x-ray tube is the: | Volt |
| The frequency of alternating current (AC) delivered by electric utilities in the United States and Canada is: | 60 Hz |
| The purpose of a transformer is to: | Increase or decrease voltage |
| Which electron shell in the atom is most important for the production of x-rays? | K |
| Electrons are held in place around the nucleus of the atom by a: | Shell |
| When an atom gains or loses an electron it is called an: | ion |
| The process of converting AC to DC is called: | rectification |
| One of the most important elements in radiology that is used to create the x-rays is: | Lead |
| X-rays cause ionization in the human body. This has a negative effect on the body. | True |
| When a step-up transformer increases voltage from the primary side to the secondary side of a transformer, amperage is increased. | False |
| If a transformer has 100 turns on the primary side and 25 turns on the secondary side, it is a step-down transformer. | True |
| A transformer with a 500:1 ratio would be step-up transformer. | True |
| X-rays with greater energy have a lower frequency. | False |
| Ammeter | Measures electrical current |
| Voltmeter | Measures electrical potential |
| Transformer | Increases or decreases voltage by a fixed amount (AC only) |
| Alternating current | Current changes polarity from negative to positive at regular intervals |
| Kilovolt (kV) | Equal to 1000 volts |
| Rectification | Process of changing AC to DC |
| Ampere (A) | Unit to measure the rate of current flow in a circuit |
| Milliampere (mA) | Equal to 0.001 A (1/1000 A) |
| Volt (V) | Unit to measure potential difference |
| Current | Quantity of electrons flowing in a circuit |
Created by:
jenren18
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