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Combined science (Higher)
Circuit components

Starter quiz

  • What happens when free electrons in a metal collide with metal ions?
    • the metal ions vibrate less vigorously
    • the metal ions vibrate as before
    • the metal ions vibrate more vigorously  ✓
  • What causes free electrons in a metal to move?
    • a resistance
    • a current
    • a p.d.  ✓
  • Which of the following effects will result from a higher p.d. across a metal wire in a working electrical circuit?
    • its free electrons will move faster  ✓
    • a higher current will flow through it  ✓
    • the metal will become cooler
    • the metal ions will vibrate less vigorously
  • Which of the followings statements about resistors A and B is correct?
    Which of the followings statements about resistors A and B is correct?
    • resistor A has a higher resistance than resistor B
    • resistor A has a lower resistance than resistor B  ✓
    • both resistors have the same resistance
    • it is not possible to say which resistor has the higher resistance
  • Which of the following elements is a semiconductor?
    • iron
    • copper
    • aluminium
    • silicon  ✓
  • Which of the following statements about the I–V graph shown is correct?
    Which of the following statements about the I–V graph shown is correct?
    • as the p.d. increases, the resistance increases
    • as the p.d. increases, the resistance decreases  ✓
    • the resistance remains the same as the p.d. changes
    • it is not possible to say if the resistance changes
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