Help
Options
Didn't know it?
click below
click below
Knew it?
click below
click below
Don't Know
Remaining cards (0)
Know
retry
shuffle
restart
0:00
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
RAD 156 Week 5
| Question | Answer |
|---|---|
| The force between two magnetic poles is___________ to the strength of the poles | Directly Proportional |
| The force between two magnetic poles is__________ to the square of the distance separating them | Inversely Proportional |
| Explain the Hans Oersted Experiment | When he made electric current flow through a wire, the needle of a nearby compass deflected |
| Magnetic Induction- | Whenever electrons move, they create a magnetic field that surrounds their path |
| the field is always________ to the current | Perpendicular |
| Conventional Electric current follows the | Flow of Positives |
| In Radiography, we follow the | Flow of Electrons |
| The magnetic field is always at_______ to the current | Right Angles |
| The magnetic field is________ at the center | Strongest |
| Electromagnetic Induction- | creating an electric field using magnets and a conductor |
| Mutual Induction- | An electric current is induced in the second coil by the moving magnetic field of the current in the first coil Requires 2 coils |
| Self Induction- | When an electric current goes through a coil, a growing magnetic field is created which expands outward from the center of the coil, Requires only one coil |
| A coil initially_______ in its own current | Resists Changes |
| Autotransformers operate on | Self Induction |
| Step Transformers operate on | Mutual Induction |
| Shell Core- | Has 2 separate magnetic paths |
| Closed Core- | Has a closed continuous magnetic path, all in one direction |
| What Transformer Core Construction is used in X-Ray Circuits | Closed Core |
| Primary Step Up coil = | less turns |
| Primary Step Down coil= | more turns |
| Secondary Step Up coil= | more turns |
| Secondary Step Down coil= | less turns |
| Step Up Coils- | Increase Voltage and Decrease Current |
| Step Down Coils- | Decrease Voltage and Increase Current |
| Solenoid- | A coiled wire with a very strong magnetic field at the center |
| What happens if we curve the wire? | The fields will not overlap – they change shape |
| Conventional Right Hand Rule | Right thumb points in the direction of the “positive” current, fingers curl in the direction of the magnetic field |
| Radiography Method | Right thumb points in the direction of the negative end of the conductor, fingers curl in the direction of the magnetic field |
Created by:
user-2016295