Operational Amplifiers 1 Questions and Answers

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Q1
An ideal operational amplifier has
  • A infinite output impedance
  • B zero input impedance
  • C infinite bandwidth
  • D All of the above
Answer: Option C
Q2
Another name for a unity gain amplifier is:
  • A difference amplifier
  • B comparator
  • C single ended
  • D voltage follower
Answer: Option D
Q3
The open-loop voltage gain (Aol) of an op-amp is the
  • A external voltage gain the device is capable of
  • B internal voltage gain the device is capable of
  • C most controlled parameter
  • D same as Acl
Answer: Option B
Q4
A series dissipative regulator is an example of a:
  • A linear regulator
  • B switching regulator
  • C shunt regulator
  • D dc-to-dc converter
Answer: Option A
Q5
A noninverting closed-loop op-amp circuit generally has a gain factor:
  • A less than one
  • B greater than one
  • C of zero
  • D equal to one
Answer: Option B
Q6
In order for an output to swing above and below a zero reference, the op-amp circuit requires:
  • A a resistive feedback network
  • B zero offset
  • C a wide bandwidth
  • D a negative and positive supply
Answer: Option D
Q7
If ground is applied to the (+) terminal of an inverting op-amp, the (–) terminal will:
  • A not need an input resistor
  • B be virtual ground
  • C have high reverse current
  • D not invert the signal
Answer: Option B
Q8
An astable multivibrator is also known as a:
  • A one-shot multivibrator
  • B free-running multivibrator
  • C bistable multivibrator
  • D monostable multivibrator
Answer: Option B
Q9
With negative feedback, the returning signal:
  • A aids the input signal
  • B is proportional to output current
  • C opposes the input signal
  • D is proportional to differential voltage gain
Answer: Option C
Q10
What starts a free-running multivibrator?
  • A a trigger
  • B an input signal
  • C an external circuit
  • D nothing
Answer: Option D

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