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Physics P10/11 (Equations :recycle: (potential difference (V)= current (A)…

- - - - Fuses - The surge in current melts the fuse wen the amount of current is greater than the fuse rating. Fuses are connected to the live wire, so that breaking the fuse breaks the circuit and cuts off the live supply. Although they are useful, they need to be replaced after the burn out.
      - Earth Wires - If a fault develops in which the live wire somehow touches the metal case, then because the case is earthed, too great a current flows in thought the live wire, through the case and down the earth wire, therefore no shock and all voltage is sent to the ground.
- - - - Current is directly proportional to p.d (if the temperature stays the same). Different resistors have different resistances, so their IV graphs have different slopes. LINEAR
  - - - The increasing current increases the temperature of the filament, which makes the resistance increase so their IV graphs are curved. NON LINEAR
  - - - Current will only flow through a diode in one direction as shown. The diode has a very high resistance in the opposite direction. NON LINEAR