Input Offset Voltage MCQ

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• Find the maximum possible output offset voltage, which is caused by the input offset voltage Vio=15mv?
  ক

  0.075v

  খ

  0.75v

  গ

  0.75v

  ঘ

  7.5v
• The offset voltage in the voltage follower is balanced using
  ক

  Voltage drop across the load resistor

  খ

  Voltage drop across feedback resistor

  গ

  Compensating network connected to inverting input terminal

  ঘ

  Compensating network connected to non- inverting input terminal
• What is the advantage of compensated differential amplifier?
  ক

  All of the mentioned

  খ

  Slightly complex circuit

  গ

  Does not affect CMRR

  ঘ

  Balanced op-amp
• How to achieve maximum CMRR in the given circuit?
  ক

  R1 = RF

  খ

  RF = R3|| RC+ RB and R1= R2

  গ

  R1= R2 and RF= R3+ RC

  ঘ

  None of the mentioned
• Why closed loop differential amplifiers are difficult to null?
  ক

  Due to compensating network

  খ

  Due to feedback loop

  গ

  Due to input offset voltage

  ঘ

  None of the mentioned
• Where does the compensating network connected in an inverting amplifier.
  ক

  Non-inverting input terminal

  খ

  Inverting input terminal

  গ

  Between non-inverting and output terminal

  ঘ

  Between inverting and output terminal
• How the value of output offset voltage is reduced in closed loop op-amp?
  ক

  By increasing gain

  খ

  By reducing gain

  গ

  By decreasing bandwidth

  ঘ

  By reducing bandwidth
• When the input voltage is reduced to zero in a closed loop configuration the circuit acts as
  ক

  Inverting amplifier

  খ

  Non-inverting amplifier

  গ

  Inverting and non-inverting amplifier

  ঘ

  None of the mentioned
• Why does an op-amp without feedback is not used in linear circuit application?
  ক

  Due to high current gain

  খ

  Due to high voltage gain

  গ

  Due to high output signal

  ঘ

  All of the mentioned
• Find the value of Ra and Rb from the circuit shown?
  ক

  Ra =4.6kΩ ; Rb= 9kΩ

  খ

  Ra =7.3kΩ ; Rb= 3.4kΩ

  গ

  Ra =2.5kΩ ; Rb= 5.1kΩ

  ঘ

  Ra =4kΩ ; Rb= 10kΩ
• Calculate the maximum thevenin equivalent resistance, if a 10kΩ potentiometer is used?
  ক

  0.4kΩ

  খ

  5 kΩ

  গ

  2.5kΩ

  ঘ

  4kΩ
• Find the thevenin’s equivalent for resistance and voltage?
  ক

  1-iii, 2-ii, 3-1

  খ

  1-ii, 2-I, 3-iii

  গ

  1-I, 2-ii, 3-iii

  ঘ

  1-ii, 2-iii, 3-i
• What will the condition of op-amp, before applying any external input
  ক

  Compensated

  খ

  Biased

  গ

  Balanced

  ঘ

  Zero
• Which of the following op-amp does not need compensating network?
  ক

  777

  খ

  741

  গ

  748

  ঘ

  All of the mentioned
• To reduce the output offset voltage VooT to zero
  ক

  Input offset voltage compensating network is added at the inverting input terminal

  খ

  Input offset voltage compensating network is added at the non-inverting input terminal

  গ

  Input offset voltage compensating network is added at the output terminal

  ঘ

  None of the mentioned
• If three different 741 op-amps are taken and the corresponding output offset voltage for each of them is measured. The output voltage in these three op-amps have
  ক

  Same amplitude and polarity

  খ

  Different amplitude and polarity

  গ

  Same amplitude and different polarity

  ঘ

  Different amplitude and same polarity
• The input offset voltage of 741 op-amp has an absolute maximum value of 6mv, which means
  ক

  Minimum difference between input terminals in 741 op-amp can be large as 6mv DC

  খ

  Minimum difference between input terminals in 741 op-amp can be large as 6mv AC

  গ

  Maximum difference between input terminals in 741 op-amp can be large as 6mv DC

  ঘ

  Maximum difference between input terminals in 741 op-amp can be large as 6mv AC
• Define polarity of the output offset voltage in a practical op-amp?
  ক

  Positive polarity

  খ

  Negative polarity

  গ

  Positive or negative polarity

  ঘ

  None of the mentioned
• What happens due to mismatch between two input terminals in an op-amp?
  ক

  Input offset voltage

  খ

  Output offset voltage

  গ

  Bothe the input and output offset voltage

  ঘ

  None of the mentioned
• What makes the output voltage equals to zero in practical op-amp?
  ক

  Input offset voltage

  খ

  Output offset voltage

  গ

  Offset minimizing voltage

  ঘ

  Error voltage