Operational Amplifier mcq objective questions and answers part1

Q1. A 741 C contains
(A) Distortion resistors
(B) Inductors
(C) Active load resistors
(D) A large coupling capacitor

Q2. When the initial slope of a sine wave is greater than the slew rate
(A) Distortion occurs
(B) Linear operation occurs
(C) Voltage gain is maximum
(D) The op amp works best

Q3. unity gain amplifier is a
(A) difference amplifier
(B) comparator
(C) single ended
(D) voltage follower

Q4. Of the values listed, the most realistic value for open-loop voltage gain of an OP-amp is
(A) 0
(B) 1000
(C) 90 dB
(D) 10db

Q5. With zero volts on both inputs, an OP-amp ideally should have an output
(A) equal to the inverting voltage
(B) equal to the non inverting voltage
(C) equal to zero
(D) equal to CMRR

Q6. If the cutoff frequency is 20 Hz and the mid band open loop voltage gain is 1,000,000 the unity gain frequency is
(A) 20 Hz
(B) 1 MHz
(C) 2MHz
(D) 20MHz

Q7. At the unity gain frequency, the open loop voltage gain is
(A) 1
(B) Av(mid)
(C) Zero
(D) Very large

Q8. The voltage gain of a loaded differential amp is
(A) Large than the unloaded voltage gain
(B) Equal to Rc/ re
(C) Smaller than the unloaded voltage gain
(D) Impossible to determine

Q9. With both bases grounded, the only offset that produces an error is the
(A) Input offset current
(B) Input bias current
(C) Input offset voltage
(D) None of these

Q10. The use of negative feedback
(A) reduces the voltage gain of an Op-amp
(B) makes the Op-amp oscillate
(C) makes linear operation possible
(D) Both A and B

Q11. The input offset current is usually
(A) Less than the input bias current
(B) Equal to zero
(C) Less than the input offset voltage
(D) Unimportant when a base resistor is used

Q12. The typical input stage of an op amp has a
(A) Single ended input and single ended output
(B) Single ended input and differential output
(C) Differential input and single ended output
(D) Differential input and differential output

Q13. The common mode rejection ratio is
(A) Very low
(B) As high as possible
(C) Equal to the voltage gain
(D) Equal to the common mode voltage gain

Q14. The input stage of an op amp is usually a
(A) Differential amp
(B) Class B push pull amplifier
(C) CE amplifier
(D) Swamped amplifier

Q15. The common mode voltage gain is
(A) Smaller than the voltage gain
(B) Equal to the voltage gain
(C) Greater than the voltage gain
(D) None of the above

Q16. A common-mode signal is applied to
(A) The non-inverting input
(B) The inverting input
(C) Both inputs
(D) The top of the tail resistor

Q17. For an Op-amp with negative feedback, the output is
(A) equal to the input
(B) increased
(C) fed back to the inverting terminal
(D) fed back to the non inverting terminal

Q18. When the two input terminals of a diff amp are grounded
(A) The base currents are equal
(B) The collector currents are equal
(C) An output error voltage usually exists
(D) The ac output voltage is zero

Q19. The input offset current equals the
(A) Difference between the two base currents
(B) Average of the two base currents
(C) Collector current divided by current gain
(D) Difference between the two base-emitter voltages

Q20. The op amp can amplify
(A) AC signals only
(B) DC signals only
(C) Both ac and dc signals
(D) Neither ac not dc signals