WorksheetsRME Review - Semiconductors
Total questions: 11
Worksheet time: 6mins
Which material is most commonly used in semiconductor components?
silicon
copper
aluminum
gold
How does a diode function in an electrical circuit?
It allows current to flow in both directions
It blocks current flow in all conditions
It allows current to flow in one direction only
It amplifies current
What type of semiconductor device is used to control high-power AC loads?
Diode
Thyristor (SCR)
resistor
transformer
In an electrical panel, where might you find semiconductors?
circuit breakers
contactors
VFD
grounding rods
Which semiconductor device is commonly used for rectification in power supplies?
triac
diodes
transformer
inductor
In a three-phase motor drive system, how are semiconductors used?
They help in mechanical alignment
They act as thermal insulators
They regulate voltage and current through switching devices like IGBTs
They increase the physical size of the motor
What is the purpose of a Zener diode ?
To store energy
To allow current to flow in both directions
To provide surge protection
To increase current flow
Why are IGBTs (Insulated Gate Bipolar Transistors) used in VFDs?
They provide efficient, high-speed switching for AC motor control
They generate resistance in circuits
They increase the weight of the motor
They prevent current from flowing
How many valence electrons does semiconductors have?
4
8
2
0
What happens when a semiconductor junction is forward biased?
It blocks current flow
It allows current to flow
It amplifies voltage
It stores charge
How does the resistance of a semiconductor change with an increase in temperature?
It remains constant
It decreases as temperature increases
It increases as temperature increases
It fluctuates randomly
