Common Output Components

Question 1

LED
Stands for
Characteristics
Uses

Answer 1

Light emitting diode

Characteristics:
Produces light
Connected by anode, cathode
Has polarity
Low voltage
Low power consumption 
Long lasting
Hard to change if broken

Uses:
Low power lighting
Torches 
TV screens
Power indicators

Question 2

Lamp
Characteristics
Uses

Answer 2

Characteristics:
Produces light
Can be brighter than LED’s
Less economical due to heat produced
Not long lasting
Easy to change

Uses:
Household lamps
Car headlamps
Street lights 
Floodlights
Security lights

Question 3

Buzzer
Characteristics
Uses

Answer 3

Characteristics:
Mid to high pitched buzz created by fast oscillating electromagnetic parts
Had polarity

Uses:
Alarm systems
Door entry systems
Children toys 
Electronic games

Question 4

Speaker
Characteristics
Uses

Answer 4

Characteristics:
Full range of sound available
Variety of power ratings
Variety of frequency responses

Uses:
Headphones
Music systems
Intercoms
Radios