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WorksheetsMAEE ONLINE EXAM 03-08-2021
Total questions: 30
Worksheet time: 15mins
full form of LED
light emitting diode
light limiting diode
light storing diode
light electrification diode
led works only in ______ bias
Forward
Reverse
The colour of emitted light from LED depends on
physical dimensions of LED
Number of available carriers
Type of semiconductor material used
Number of recombinations taking place
The advantage of LED is
Low operating voltage
Long Life
Small in Size
All the above
In a photo diode, when there is no incident light, the reverse current is almost negligible and is called
zener current
dark current
photo current
drift current
The principle of a solar cell is same as the photo diode
TRUE
FALSE
LEDs available in two legs only. this statement is true or false ?
True
False
What are the names of the terminals X, Y and Z?
X = Base, Y = Collector, Z = Emitter
X = Emitter, Y = Base, Z = Collector
X = Collector, Y = Base, Z = Emitter
X = Collector, Y = Emitter, Z = Base
In which circuit does the bulb light up?
Transistors act like tiny "____________."
Electron sources
Switches
Batteries
Bees?
transistor has 3 electrodes namely
PNP
NPN
Base/ Collector/ Emitter
Drain/ Gate/ Source
A transistor is a …………… operated device
Voltage
Both Voltage and Current
Current
None of the Above
What is this?
Vacuum Tube
Transistor
Circuit
The shorter leg of an LED is what?
Positive
Negative
The number of depletion layers in a transistor is
1
3
2
4
The element that has the biggest size in a transistor is
base
emitter
collector
none
At the base-emitter junctions of a transistor, one finds
a reverse bias
a wide depletion layer
low resistance
none of the above
Which of the among are the types of transistors?
Bipolar Junction Transistors (BJT)
Field Effect Transistors (FET)
Both A and B
None of the above
identify the image
npn
pnp
n type
p type
In a pnp transistor, the current carriers are
holes
donor ions
acceptor ions
free electrons
Depletion region behaves as
Semiconductor
insulator
conductor
High resistance
For an n-channel FET, What is the direction of current flow?
Source to drain
Drain to source
Gate to source
Gate to drain
A photoresistor is an electronic component whose electrical resistance ________________________________when it is exposed to light.
changes
increases
doesn't change
To build a light barrier in a car parking gate mechanism we need a _____________ .
Photoresistor sensor
Phototransistor sensor
We use a __________________ to switch off the light automatically.
Photoresistor sensor
Phototransistor sensor
Resistance of photoresistor sensor is low in brightness
True
False
IC stands for what?
Integrated Circuit
Inbuilt Circuit
In-line Circuit
Indirect Circuit
Name this circuit board
Tested Complete Board
Printed Circuit Board
Breadboard
Stripboard/ Veroboard
Point out which of the following is the disadvantage of integrated circuit?
A. Parameter within the IC cannot be modified
B. Low power requirement
C. ICs are considered to use minimum number of external connections
D. Failure rate is low
What is PCB?
Electronic board that connects circuit components
Prototyping circuit board that connect electronic components
Solderless circuit board that connect electronic components
Construction base for prototyping of electronics
