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Flashcards

Circuits

Gretta Mildred Physics GCSE English 5.0Average rating 5.0 out of 5 (1 rating) 37 cards

Circuits

Cards in this deck (37)

  1. 1What is this?The cellWhat is this?
  2. 2What is this?An open switchWhat is this?
  3. 3What is this?A closed switchWhat is this?
  4. 4What is this?A lamp/ filament lampWhat is this?
  5. 5What is this?A batteryWhat is this?
  6. 6What is this?A voltmeterWhat is this?
  7. 7what is this?Resistorwhat is this?
  8. 8What is this?FuseWhat is this?
  9. 9What is this?An ammeterWhat is this?
  10. 10What is this?A variable resitorWhat is this?
  11. 11What is this?ThermistorWhat is this?
  12. 12What is this?Light-dependent resistorWhat is this?
  13. 13What is this?Light emitting diodeWhat is this?
  14. 14What is this?A diodeWhat is this?
  15. 15What has to be put in series?An ammeter
  16. 16What has to be connected in parallel?A voltmeter
  17. 17Resistors and currentThe current through a resistor is directly proportional to potential difference. Different resistors have different resistances
  18. 18Filament lamp in relation to resistance?As the temperature of the filament increases, the resistance increases, hence the curved graph.
  19. 19Diode and resistanceCurrent will only flow through a diode in one direction. The diode has very high resistance in the opposite direction
  20. 201. Why does resistance increase with temperature?1. When an electrical charge flows through a resistor, some of the electrical energy is transferred to heat energy- resistor gets hot
  21. 212. Why does resistance increase with temperature?This heat energy causes the ions in the conductor to vibrate more
  22. 223.Why does resistance increase with temperature?This makes it more difficult for the charge-carrying electrons to get through the resistor- the current can't flow as easily- resistance increases
  23. 234.Why does resistance increase with temperature?For most resistors, there is a limit to the amount of current that can flow. More current means an increase in temperature, which means an increase in resistance, which means the current decreases again
  24. 24What is a diode used for?Made of semiconductor material e.g. silicon. Regulates the potential difference in circuits
  25. 25What is a light-emitting diode used for?LEDs emit light when a current flows through it in the FORWARD direction. Use smaller current. Indicate presence of current in a circuit.
  26. 26What are light- dependent resistors used for?They are dependent on the intensity of light. Bright light= resistance falls, darkness= high resistance
  27. 27What is a thermistor?Temperature-dependent resistor. HOT conditions= resistance DROPS, COOL conditions = resistance INCREASES
  28. 28In series circuits, potential difference is..?SHARED
  29. 29In series circuits, current is..THE SAME EVERYWHERE
  30. 30In series circuits, resistance..?ADDS UP
  31. 31In series circuits, cell voltages..?ADD UP
  32. 32In parallel circuits, potential difference is..?THE SAME ACROSS ALL COMPONENTS
  33. 33In parallel circuits, the current is...?SHARED- total current flowing is equal to the total of all the currents through the separate components
  34. 34What is the voltage of UK mains supply?230 volts
  35. 35What is the UK mains supply- alternating or direct current?Alternating current- 50Hz
  36. 36What is AC?Alternating current- current constantly changes direction
  37. 37What is DC?DC- used by cells and batteries, current always flows in THE SAME DIRECTION

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Description
GCSE Physics Flashcards on Circuits, created by Gretta Mildred on 04/05/2015.
Created by
Gretta Mildred
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Average rating 5.0 out of 5 (1 rating)

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