Components

Question 1

what is a rectifier and diode?

Answer 1

• rectifier turns alternating current into direct current
• diode allows current to flow in one direction

Question 2

what is a thermistor?

Answer 2

• component where resistance changes with its temp
• increasing temp decreases resistance

Question 3

give an example of the use of a thermistor?

Answer 3

to turn a heater off when a house reaches certain temp

Question 4

what is a LDRs?

Answer 4

• light dependant resistor changes with light intensity
• increasing light intensity decreases the resistance

Question 5

give an example of the use of LDRs

Answer 5

to switch lights off when it gets too dark

-sense whether camera needs flash