WorksheetsLED
Total questions: 10
Worksheet time: 5mins
LED means
Light Emitting Display
Light Emitting Diode
Laser Emitting Display
Laser Emitting Diode
Semi- conductors are materials which
can conduct current completely
can block current
can conduct current partially
none of these
............................is not an example of electronic component
bulb
diode
mirror
resister
Symbol of LED
None of these
doping is the process of
combination of electrons
adding impurities
removing electrons
all these
Electroluminescence is the process of
producing light and heat from current
producing current
producing light with from current without heat
producing heat from current
Advantages of LED
High energy efficiency
Long lifespan
Law radiated heat
All of these
LED will work only if it is connected to a battery in
Forward biased
Reverse biased
Both case
Without battery
Short leg of LED is
Anode
Cathode
Emitter
Collector
The colour of LED depends on
Colour of battery
Colour of Gas used in it
Based on doping material
None of these
