Electronics (2)

• What is an input device?

  It responds to something physical.
• How does an input device function?

  It transforms a form of energy into electrical energy.
• What is an output device?

  It converts electrical energy into another type of energy.
• What is a potential divider?

  • Consists of two components
  • Usually resistors
  • Connected in series
• How does the resistance of a thermistor change with temperature?

  Resistance decreases as temperature increases.
• How does the resistance of an LDR change with light intensity?

  Resistance decreases as light intensity increases.
• What is a capacitor?

  A device that stores electric charge.
• How should an LED be connected for it to turn on?

  The angle must point towards the negative.
• When does a transistor turn on?

  When the input voltage is higher than a certain voltage.
• What voltage at the base of a transistor switches it on?

  Greater than 0.7V
• What voltage at the gate of a MOSFET transistor switches it on?

  Greater than 2.0V