Q. What is the bandgap energy in semiconductor physics?
-
A.
The energy required to free an electron from the valence band
-
B.
The energy of the conduction band
-
C.
The energy of the valence band
-
D.
The energy lost during conduction
Solution
The bandgap energy is the energy required to free an electron from the valence band to the conduction band in a semiconductor.
Correct Answer:
A
— The energy required to free an electron from the valence band
Learn More →
Q. What is the main difference between NPN and PNP transistors?
-
A.
NPN transistors have a positive collector
-
B.
PNP transistors have a negative emitter
-
C.
NPN transistors use electrons as charge carriers
-
D.
PNP transistors are always off
Solution
NPN transistors use electrons as charge carriers, while PNP transistors use holes.
Correct Answer:
C
— NPN transistors use electrons as charge carriers
Learn More →
Q. What is the role of a coupling capacitor in amplifier circuits?
-
A.
To block DC and allow AC signals
-
B.
To amplify the signal
-
C.
To provide feedback
-
D.
To increase bandwidth
Solution
A coupling capacitor blocks DC while allowing AC signals to pass, which is essential in amplifier circuits.
Correct Answer:
A
— To block DC and allow AC signals
Learn More →
Q. Which component is used to control the flow of current in a circuit?
-
A.
Resistor
-
B.
Capacitor
-
C.
Inductor
-
D.
Transistor
Solution
A transistor is used to control the flow of current in a circuit, acting as a switch or amplifier.
Correct Answer:
D
— Transistor
Learn More →
Showing 1 to 4 of 4 (1 Pages)
