MCQs Electrical Engineering
1. In a single stage amplifier D.C. and A.C. load lines
(1) are always parallel
(2) are perpendicular to each other
(3) cross each other at Q-point
(4) are inclined but do not cross each other
Ans (3)
2. A 4 - bit R/2R digital-to-analog (DAC) converter has a reference of 5 volts. What is the analog output for the input code 1010-'
(1) 0.3125 V
(2) 3.125 V
(3) 0.78125 V
(4) - 3.125
Ans (2)
3. An operational amplifier has a differential gain of 100 and a common mode gain of 0.10 Its CMRR will be
(1) 20 dB
(2) 40 dB
(3) 60 dB
(4) 80 dB.
Ans (4)
4. In general, if a sine wave is fed into a Schmitt trigger, the output will be
(1) A square wave
(2) A saw-tooth wave
(3)an amplified sine wave
(4) a triangular wave
Ans (1)
5. An amplifier has a gain of 10,000 expressed in decibels the gain is ?
(1) 40
(2) 10
(3) 80
(4) 100.
Ans (3)
6. The gain of an operational amplifier will be maximum at -
(1) 1 Hz
(2) 50 Hz
(3) 100 Hz
(4) DC
Ans (4)
7. The large signal bandwidth of an OPamp is limited by its -
(1) Loop gain
(2) Slew rate
(3) Output impedance
(4)Input frequency
Ans (2)
8.A differentiator circuit acts like as.
(1) Band pass filter
(2)Band stop filter
(3)Low pass filter
(4) High pass filter
Ans (4)
9. An ideal OP - Amp. draws.
(1) Zero current
(2) Sum of the two input currents
(3) Difference of the two input currents
(4) Infinite current
Ans (1)
10. Slew rate is defined by.
(1) di / dt (max)
(2) dv / dt (max)
(3) di / dt (min)
(4) dv / dt (mn)
Ans (2)
For More MCQs Electrical Engineering - Click Here