Electronic Components

What does a thermistor do in a smart home?

• Controls the lighting system

• 
  Measures the amount of electricity used

• 
  

  Controls the heating or cooling system

• 
  Plays music depending on the temperature

How does a Light Dependent Resistor (LDR) work?

• It generates electricity when exposed to light

• It lets more or less electricity through based on light intensity

• 
  It turns off all lights in the room when it's dark

• 
  

  It changes its color based on the light

What makes LEDs preferred for lighting in smart homes?

• They can play music

• They use a lot of power

• 
  

  They use less power and last longer

• 
  

  They are less efficient than old-school light bulbs

What is electrical resistance compared to in the text?

• Swimming in a pool

• 
  Flying a kite in the wind

• 
  

  Running in an open field

• 
  

  Pushing a ball through a tube filled with honey

What happens to a thermistor's resistance when the temperature changes?

• 
  It becomes zero

• 
  It plays music

• 
  

  It locks the doors at night

• 
  

  It automatically turns lights on when it gets dark

What role does an LDR play in a smart home?

• 
  It cooks food when it's dark

• 
  It controls the temperature

• 
  

  It locks the doors at night

• 
  

  It automatically turns lights on when it gets dark

What does LED stand for?

• Light Emitting Diode

• Light Energy Device

• Low Energy Design

• Long-lasting Electric Device

What changes when you adjust the resistance in a circuit with a dimmer switch?

• The colour of the light bulb

• The brightness of the light bulb

• The size of the light bulb

• The shape of the light bulb

What is a thermistor used for in electronic devices?

• To play music

• To light up the screen

• To regulate temperature

• To increase volume

What happens to the resistance of an NTC thermistor when the temperature increases?

• It stays the same

• It decreases

• It increases

• It turns off the device