final 0.0 / 5 ? PhysicsASOCR Created by: SusieCreated on: 04-06-13 22:11 Kirchoff's first law sum of current entering a junction=sum of current exiting a junction 1 of 27 kirchoff's 2nd law total emf=sum of pd of all componants 2 of 27 potential difference 1V=1J/C energy per unit charge. loss of electrical energy 3 of 27 electromotive force gain of electrical energy 4 of 27 ohms law constant temperature, I and V are proportional in a conductor 5 of 27 i/v resistor straight 6 of 27 i/v filament lamp s 7 of 27 i/v LED at 0 until 6V 8 of 27 LED advantages -last longer -one goes out others stay on -efficient energy conversions 9 of 27 resistivity the resisting power of 1m 1m2 length. Relies on intensity and temperature 10 of 27 fuse a sudden surge from when the earth wire touches the case blows the fuse to stop the circuit getting any hotter 11 of 27 increase temp releases more charge carriers 12 of 27 UV-A ageing 13 of 27 UV-B cancerous, tan 14 of 27 UV-C ozone 15 of 27 Polarized only oscillates in one direction 16 of 27 Malus' Law polarisation angles I=io cos2 pheta a= ao cos pheta 17 of 27 Principle of superposition the resultant displacement of the wave is the sum of the vector componants 18 of 27 F=wD/d fringe spacing= wavelength * distance from slits to screen/distance between slits 19 of 27 Photon quantum of energy of electromagnetic radiation 20 of 27 Electron volt kinetic energy gained when electron is accelerated by 1v 21 of 27 Finding Planks constant know w find V plot V and 1/w m= hc/e c and e are constants 22 of 27 Work function min energy to release electron 23 of 27 threshold frequency min frequency needed to give wf 24 of 27 Max. KE hf=wf+ max ke 25 of 27 Intensity is proportional tooooo A^2 and energy and current 26 of 27 spread increase? faster and increased wavelenght 27 of 27
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