Additional physics- Resistance and V=I times R 0.0 / 5 ? PhysicsResistanceGCSEAQA Created by: nimrahali12Created on: 25-09-16 15:08 Resistance increases with? temperature 1 of 12 When an electrical charge flows through a resistor , some of the electrical energy is ? Transferred to heat energy and the resistor gets hot 2 of 12 This heat causes the ions in the conductor to? vibrate more 3 of 12 With the ions jiggling around its more difficult for the charge carrying electrons to? get through the resistor -the current can't flow through as easily and the resistant increases 4 of 12 For most resistors there is a limit to the amount of? current that can flow 5 of 12 More current means? an increase in temperature which means an increase in resistance which means the current decreases again 6 of 12 This is why the graph for filament lamp levels off at? high currents 7 of 12 Whats the formula for potential difference? current times resistance 8 of 12 For the straight line graphs , the resistance of the component is steady and? is equal to the inverse of the gradient of the line or "1/gradient" 9 of 12 This means? the steeper the graph the graph the lower is resistance 10 of 12 If the graph curves, it means? the resistance is changing 11 of 12 In that case , R can be found for any point by taking the? pair for values from the graph and sticking them in the formula R=V/R 12 of 12
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