X-Ray Circuit Kahoot Word Scramble
|
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.
Normal Size Small Size show me how
Normal Size Small Size show me how
| Question | Answer |
| The study of stationary electric charges is | electrostatics |
| The study of electric charges in motion | electrodynamics |
| Electricity is typically thought to be the same as | electrodynamics |
| The unit of measurement of electrical charges (SI) is | Coulomb |
| A material that has a large number of free electrons is a | good conductor |
| One of the laws of electrostatics is that like charges ________ and unlike charges ___________. | repel; attract |
| As two charges get closer, the electrostatic force is | inversely proportional to the square of distance b/t them |
| If a conductor is curved, the greatest amount of charge will be found | at the area of the greatest curvature of the conductor |
| Rubbing a rubber rod with fur is an example of electrification by | friction |
| Electrification by induction requires that the two objects | are not at all in contact with each other |
| To get electrons to flow along a conductor, there must be | excessive positive and negative charges at opposite ends |
| The ability to do work because of a separation of charges is | electric potential |
| The flow of electrons along a conductor is | electric current |
| The property of a circuit that impedes the flow of electrons is | resistance |
| The volt is the unit of measure for | electric potential |
| The ampere is the unit of measure for | electric current |
| A volt is the ratio of work per unit of charge and is written | Joules/Coulomb |
| Kilovoltage peak is abbreviated as | kVp |
| A material that allows electrons to move is a(n) | conductor |
| A material that resists the movement of electrons is a(n) | insulator |
| Which of the following materials is a good conductor? | copper |
| Glass is an example of a(n) | insulator |
| A battery produces | direct current |
| Current that changes direction in the conductor is | alternating current |
| The 60 Hz of electricity flowing into homes in the U.S. characterizes | alternating current |
| Ohm's law can be written as | volts = amps × ohms |
| Ohm’s law can be written as | I = V/R |
| When a conductor is longer: | resistance increases |
| When a conductor has a smaller cross-sectional area: | resistance increases |
| When a metallic conductor is colder: | resistance decreases |
| When a conductor is more twisted: | resistance remains the same |
| Which of the following is NOT a good electrical conductor? | Glass |
| Which of the following is NOT a good insulator? | Gold |
| Rubber is | an excellent insulator |
| A closed pathway of wires and related elements is a(n) | electric circuit |
| When a switch is turned on, the electric circuit | is closed |
| A device that temporarily stores charge is the | Parallel circuit |
| A device that temporarily stores charge is the | capacitor |
| An adjustable form of a resistor is the | rheostat |
| Which of the following opens a circuit to keep the circuit and devices safe? | Fuse and circuit breaker |
| Which of the following devices allow the electricity to flow in one direction only? | Diode |
| The device that regulates the amount of current flowing in the circuit is the | resistor |
| The device that produces electrons through a chemical reaction is a | battery |
| Which of the following devices can increase or decrease voltage by a set amount? | Battery and transformer |
| The purpose of grounding is to | none of the above |
| Material that conduct electricity, not not conductors & insulate but not as well as insulator | semiconductor |
| A circuit w/ elements that are arranged like a “bridge” or branching across a conductor is | parallel circuit |
| The ability of a material to attract iron, cobalt, or nickel is called | magnetism |
| The lines of force in space associated with a magnet are called | Lines of flux |
| Inside the magnet, the lines of flux travel from | south pole to north pole |
| Outside the magnet, the lines of flux travel from | north pole to south pole |
| Like poles of a magnet _________ each other and opposite poles ________ each other. | repel; attract |
| The force of magnetic attraction varies | inversely with the square of the distance between the poles |
| Magnetic field strength is measured in | tesla |
| A material that is weakly repelled by a magnetic field is classified as | diamagnetic |
| A material that is strongly attracted to a magnetic field is | ferromagnetic |
| A material that is weakly attracted to a magnetic field is | paramagnetic |
| Wood and plastic are considered | nonmagnetic |
| Faraday’s Law of Electromagnet Induction, if the strength of the magnetic field is ^, _____ ^ | current |
| Reducing the number of coils in the wire will result in | reduced electromagnetic induction |
| Increasing the strength of the magnetic field results in | increased electromagnetic induction |
| Slowing down the speed at which the conductor passes through the magnetic field results in | reduced electromagnetic induction |
| Mutual induction involves electricity being induced into a | secondary coil |
| With mutual induction, to induce voltage in the secondary coil, there must be | alternating current in the primary coil of wire |
| ______________ current is induced in the secondary coil when mutual induction takes place. | alternating |
| A device that converts mechanical energy to electrical energy is a | generator |
| A device that converts electrical energy to mechanical energy is a | motor |
| A step-up transformer results in | increased voltage |
| A step-down transformer results in | increased current |
| A step-up transformer results in | decreased current |
| A step-down transformer results in | decreased voltage |
| A transformer with 100 times more turns on the secondary side as compared with the primary | is a step-up transformer |
| A transformer with 100 turns on the primary side and 50 turns on the secondary | is a step-down transformer |
| The autotransformer | uses self-induction |
| The autotransformer is found on the | primary circuit |
| The mA meter is found on the | secondary circuit |
| The rectifiers are found on the | secondary circuit |
| The main power switch is found on the | primary circuit |
| The x-ray tube (not filaments) is found on the | secondary circuit |
| The rheostat is found on the | filament circuit |
| The primary side of the high-voltage transformer is found on the | primary circuit |
| The timer circuit is found on the | primary circuit |
| The step-down transformer is found on the | filament circuit |
| The secondary side of the high-voltage transformer is found on the | secondary circuit |
| The filaments within the x-ray tube are found on the | filament circuit |
| The device referred to as the kVp selector is the | autotransformer |
| The only adjustable transformer in the x-ray circuit is the | autotransformer |
| The timer located on the secondary circuit is the | mAs timer |
| AEC stands for | automatic exposure control |
| For AEC, the ionization chamber is placed between the ____________ and _____________. | patient; image receptor |
| Assuming all other factors are accurately adjusted, the exposure time with AEC is based on | the anatomy placed over the ionization chamber |
| The _____________________ converts volts to kilovolts. | step-up transformer |
| AEC controls the ________________ of radiation reaching the image receptor | quantity |
| The devices that change alternating to direct current are the | rectifiers |
| The solid-state rectifier has a(n) _______ crystal and a(n) _________ crystal. | p-type; n-type |
| The n-type crystal from a solid-state rectifier has an abundance of | electrons |
| Half-wave rectification | all of these answers |
| Ripple refers to | the fluctuation in voltage in the electricity |
| Single-phase full-wave rectified current has | 100% ripple |
| The less the ripple the | more consistent the energy of the x-rays produced |
| The least amount of ripple is the result of | high-frequency generators |
| What must be adjusted to change the temperature of the filament? | Rheostat |
| The rate of flow of electrons passing through the x-ray tube during an exposure is | mA & tube current |
| Adjusting the rheostat changes the _______________ in the ______________ circuit. | resistance; filament |
| The purpose of the filament circuit is to | boil electrons off the filament |
| A general purpose radiographic tube typically has ____ filament(s). | 2 |
| At the operating console, you choose the filaments being used by selecting what | small or large focal spot |
| Electric charges are found only on the outside of a conductor. | True |
| Only electrons are free to move in solid conductors. | True |
| Water is a good conductor | True |
| Lines of flux in the same direction attract each other. | False |
| Lines of flux in the opposite directions attract each other. | True |
Created by:
Madisonanne28
Popular Physics sets