Physics Unit 3 and 4 Flash Cards
Physics
For Queensland physics student in year 12 Made by Matt Martin - 99.95 ATAR in 2023 This is what I used to memorize physics
Sample Data
| Front | Determine the direction a current carrying wire moves inside a magnetic field
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| Back | 1. Thumb points in current's direction2. Fingers point in magnetic field's direction3. Palm will point in the direction of the forceFor A: Thumb is left/down, fingers point right (towards south) palm points out of page. Force pushes out of page.For B: At top of loop: Thumb points right, fingers point into page. palm pushes up. At bottom, palm pushes down, stretching the wire. (magnetic field found using other rule) |
| Front | Explain the twin paradox |
| Back | Two identical twins, one flies away at relativistic speeds for 5 years, then flies back.For Earth Twin: Rocket twin was moving quickly and is now younger as he experienced time moving more slowly.For Rocket Twin: Earth tiwn was moving quickly and experiencing time slower, so he is younger.Paradox: Both can't be younger than each other.Solution: Special relativity only applies with no acceleration. Changing directon of rocket = Acceleration.Earth twin's prespective is correct. Earth twin is older. |
| Front | Recall how to draw magnetic field lines around a straight conductor (Right hand rule) for the following wire1.
 2.
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| Back | 1. Point right thumb in the direction of the current2. Using a flat hand, fingers point to the region of interest3. Inside of hand (palm) will point to the direction of the field at that point.For 1: A is out of page. B is into page.For 2: A is out of page. B is into page. |