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MCQ
BASIC ELECTRONICS
CONTROL SYSTEM ENGINEERING
DIGITAL ELECTRONICS
ELECTRICAL CIRCUIT ANALYSIS
ELECTRICAL ENERGY CONSERVATION AND AUDITING
ELECTRICAL ENGINEERING MATERIALS
ELECTRICAL MACHINES
ELECTRICAL VEHICLES
ELECTRICAL WIRING
ELECTROMAGNETICS
MEASUREMENT & INSTRUMENTATION
MICROPROCESSOR AND MICROCONTROLLER INTERFACING
POWER ELECTRONICS & DRIVES
POWER SYSTEM
SIGNALS & SYSTEMS
UTILIZATION OF ELECTRICAL ENERGY
BASIC ELECTRONICS
Q1.
Current flow in a semiconductors depends on the phenomenon of
drift
diffusion
recombination
all of these
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Solution
Q2.
In a \(p^+ n\) junction diode under reverse bias, the magnitude of electric field is maximum at
The edge of the depletion region on the \(p^- n\) side
The edge of the depletion region on the \(n^-\) side
The \(p^+ n\) junction
The center of the depletion region on the\(n^-\) side
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Solution
Q3.
The resistance of a reverse biased ideal diode is
Zero
Low
Negative
Infinity
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Solution
Q4.
The maximum efficiency of a full wave rectification is
40.6%
100%
81.2%
85.6%
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Solution
Q5.
The main reason why electrons can tunnel through a P-N junction is that
They have high energy.
Barrier potential is very low
Depletion layer is extremely thin.
Impurity level is low.
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Solution
Q6.
In a NPN transistor if the emitter junction is reverse biased and collector junction is also reverse biased, the transistor will operate in
Saturation region
Inverted region
Cut-off region
Active region
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Solution
Q7.
In which of the following region of transistor operation, both the junction are reverse biased?
Cutoff
Saturation
ON switch
Active
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Solution
Q8.
In the circuit, the transistor has a large \(\beta\) value \((V_{BE} = 0.7V)\). Find the current through \(R_C\).
2mA
1.6mA
1mA
0.5mA
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Solution
Q9.
Introducing a resistor in the emitter of a common emitter amplifier stabilizes the dc operating point against variations in
Only temperature
Only the β of the transistor
Both temperature and β
None of the above
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Solution
Q10.
The current gain of a bipolar transistor drops at high frequencies because of
Transistor capacitances
High current effects in the base
Parasitic inductive elements
The early effect
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Solution
1
2
3
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