Q. In a common-emitter BJT configuration, what is the phase relationship between input and output?
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A.
In phase
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B.
Out of phase
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C.
No phase relationship
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D.
Dependent on frequency
Solution
In a common-emitter configuration, the output is 180 degrees out of phase with the input.
Correct Answer:
B
— Out of phase
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Q. In semiconductor physics, what is the term for the energy gap between the valence band and the conduction band?
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A.
Fermi level
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B.
Band gap
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C.
Conductivity
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D.
Doping level
Solution
The band gap is the energy difference between the valence band and the conduction band in semiconductors.
Correct Answer:
B
— Band gap
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Q. What is the effect of increasing the load resistance on the power delivered to the load in a resistive circuit?
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A.
Power increases
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B.
Power decreases
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C.
Power remains constant
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D.
Power becomes zero
Solution
Increasing the load resistance generally decreases the power delivered to the load, according to Ohm's law.
Correct Answer:
B
— Power decreases
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Q. What is the function of an operational amplifier (op-amp) in a circuit?
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A.
To rectify AC signals
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B.
To amplify voltage signals
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C.
To switch currents
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D.
To store charge
Solution
An op-amp is primarily used to amplify voltage signals in various applications.
Correct Answer:
B
— To amplify voltage signals
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Q. What is the primary role of a resistor in a circuit?
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A.
To store energy
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B.
To limit current
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C.
To amplify signals
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D.
To rectify voltage
Solution
A resistor is used to limit the flow of current in a circuit.
Correct Answer:
B
— To limit current
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Q. What is the typical configuration of an operational amplifier used for voltage amplification?
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A.
Inverting
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B.
Non-inverting
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C.
Differential
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D.
All of the above
Solution
Operational amplifiers can be configured in inverting, non-inverting, and differential modes for voltage amplification.
Correct Answer:
D
— All of the above
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