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Test 4 Study for Final

Description

Nuclear Program Quiz on Test 4 Study for Final, created by Katrina Himes on 12/06/2018.
Katrina Himes
Quiz by Katrina Himes, updated more than 1 year ago
Katrina Himes
Created by Katrina Himes about 6 years ago
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Resource summary

Question 1

Question
The op amp can amplify
Answer
  • AC signals only
  • DC signals only
  • Both AC and DC signals
  • Neither AC nor DC signals

Question 2

Question
The tail current of a diff amp is
Answer
  • Half of either collector current
  • Equal to either collector current
  • Two times either collector current
  • Equal to the difference in base currents

Question 3

Question
The input offset current equals the
Answer
  • Difference between the two base currents
  • Average of the two base currents
  • Collector current divided by current gain
  • Difference between the two base-emitter voltages

Question 4

Question
The tail current equals the
Answer
  • Difference between the two emitter currents
  • Sum of the two emitter currents
  • Collector current divided by current gain
  • Collector voltage divided by collector resistance

Question 5

Question
The voltage gain of a diff amp with an unloaded differential output is equal to Rc divided by
Answer
  • r'e
  • r'e/2
  • 2 r'e
  • Re

Question 6

Question
The input impedance of a diff amp equals r'e times
Answer
  • 0
  • Rc
  • Re
  • 2 ß

Question 7

Question
A dc signal has a frequency of
Answer
  • 0 Hz
  • 60 Hz
  • 0 to more than 1 MHz
  • 1 MHz

Question 8

Question
When the two input terminals of a diff amp are grounded,
Answer
  • The base currents are equal
  • The collector currents are equal
  • An output error voltage usually exists
  • The ac output voltage is zero

Question 9

Question
A common-mode signal is applied to
Answer
  • The noninverting input
  • The inverting input
  • Both inputs
  • The top of the tail resistor

Question 10

Question
The common-mode voltage gain is
Answer
  • Smaller than the voltage gain
  • Equal to the voltage gain
  • Greater than the voltage gain
  • None of the above

Question 11

Question
The input stage of an op amp is usually a
Answer
  • Diff amp
  • Class B push-pull amplifier
  • CE amplifier
  • Swamped amplifier

Question 12

Question
When the two bases are grounded in a diff amp the voltage across each emitter diode is
Answer
  • Zero
  • 0.7 V
  • The same
  • High

Question 13

Question
The input offset current is usually
Answer
  • Less than the input bias current
  • Equal to zero
  • Less than the input offset voltage
  • Unimportant when a base resistor is used

Question 14

Question
A compensating capacitor prevents
Answer
  • Voltage gain
  • Oscillations
  • Input offset current
  • Power bandwidth

Question 15

Question
At the unity gain frequency, the open-loop voltage gain is
Answer
  • 1
  • Av (mid)
  • Zero
  • Very large

Question 16

Question
If the cutoff frequency is 20 Hz and the midband open-loop voltage gain is 1,000,000, the unity gain frequency is
Answer
  • 20 Hz
  • 1 MHz
  • 2 MHz
  • 20 MHz

Question 17

Question
If the two supply voltages are ± 12 V, the MPP value of an op amp is closest to
Answer
  • 0
  • +12 V
  • -12 V
  • 24 V

Question 18

Question
The 741 V has a unity-gain frequency of
Answer
  • 10 Hz
  • 20 kHz
  • 1 MHz
  • 15 MHz

Question 19

Question
The initial slope of a sine wave increases when
Answer
  • Frequency increases
  • Peak value increases
  • Cc increases
  • Slew rate decreases

Question 20

Question
If the frequency of the input signal is greater than the power bandwidth,
Answer
  • Slew-rate distortion occurs
  • A normal output signal occurs
  • Output offset voltage increases
  • Distortion may occur

Question 21

Question
An op amp has an open base resistor. The output voltage will be
Answer
  • Zero
  • Slightly different from zero
  • Maximum positive or negative
  • An amplified sine wave

Question 22

Question
Above the cutoff frequency, the voltage gain of a 741 C decreases approximately
Answer
  • 10 dB per decade
  • 20 dB per octave
  • 10 dB per octave
  • 20 dB per decade

Question 23

Question
The voltage gain of an op amp is unity at the
Answer
  • Cutoff frequency
  • Unity-gain frequency
  • Generator frequency
  • Power bandwidth

Question 24

Question
When the slew-rate distortion of a sine wave occurs, the output
Answer
  • Is larger
  • Appears triangular
  • Is normal
  • Has no offset

Question 25

Question
A 741 C has
Answer
  • A voltage gain of 100,000
  • An input impedance of 2 MΩ
  • An output impedance of 75 Ω
  • All of the above
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