OPERATIONAL
AMPLIFIERS,OBJECTIVE
TYPE QUESTIONS BASED ON DIPLOMA LEVEL SYLLABUS FOR THE
DRDO,DMRC,SSC,BHEL,RAILWAYS & OTHER ENGINEERING(DIPLOMA LEVEL) COMPETITIVE EXAMS
1. The
characteristics of ______________ changes with application of external voltage.
a) an active element b) a
passive element
c)
both (a) and (b) d) neither
(a) nor (b)
2. The
characteristics of ______________ will not change on application
of external voltage.
a) an active element b) a passive element
3. In
_____________, the outputs are proportional to inputs.
a) digital ICs
b) linear ICs
c) both (a) and (b) d) neither (a)
nor (b)
4. In a
_____________, the inputs and outputs can take only two values; 0 and 1.
a) digital ICs b) linear ICs
c)
both (a) and (b) d) neither (a) nor (b)
5. The voltage
gain of an ideal Op-Amp is _____________.
a) infinity b) zero c) very high d) very low
6. The input
impedance of an ideal Op-Amp is _____________.
a) infinity b) zero c) very high d) very low
7. The output
impedance of an ideal Op-Amp is _____________.
a) infinity b) zero c) very
high d)
very low
8. The
bandwidth of an ideal Op-Amp is _____________.
a) infinity b) zero
c) very high d) very low
9. When equal
voltages are applied to two input terminals of an ideal Op-Amp, the output is
____________.
a)
infinity b)
zero c)
very high d) very low
10. The
voltage gain of a practical Op-Amp is _____________.
a) infinity b) zero c) very high d) very low
11. The input impedance of a practical Op-Amp is
_____________.
a) infinity b) zero c) very high d) very low
12. The output impedance of a practical Op-Amp is
_____________.
a) infinity b) zero c)
very high d) very low
13. When equal voltages are applied to two input
terminals of a practical Op-Amp, the output is
____________.
a) infinity b) zero c)
very high d) very low
14. The ratio of the differential gain of an Op-Amp to
its common mode gain
is ______________.
a) PSRR b) input off-set current c) output off-set current d) CMRR
15. In a practical Op-Amp, there will be a small output
voltage even when the inputs are zero.
This is called
_____________.
a) output off-set current b) output off-set voltage
c) input off-set current d) input
off-set voltage
16. The DC voltage which makes the output off-set
voltage zero, when the other terminal is
zero
is called _____________.
a) output off-set current b) output
off-set voltage
c) input off-set current d) input off-set voltage
17. The maximum rate at which the Op-Amp output can
change is ___________.
a) run rate b) ratio rate c) slew rate d)
none of these
18. Slew rate is expressed in terms of _________________
a)
volts/µs b)
volts-µs c) µs/volts d) µs-volts
19. The time
period for which the trace remains on a fluorescent screen after the applied
signal
becomes
zero is known as ____________.
a) existence b)
shadow c) persistence d) trace
20. The
time-base generator in a CRO is used to generate _______________.
a) the saw-tooth voltage b) the
square wave
c) the DC voltage d)
the AC voltage
21. When the
input is applied to the inverting input terminal of an Op-Amp, then the output
is
______________ with the input.
a) 900 out of phase
b) 1800 out
of phase
c)
3600 out of phase d)
in phase
22. When the
input is applied to the non-inverting input terminal of an Op-Amp, then the
output
is ______________ with the input.
a) 900 out of phase
b) 1800 out of phase
c) 3600 out of phase d) in phase
23. The
voltage gain of an ideal Op-Amp is _____________.
a) infinity b) zero c) very high d) very low
24. The input
impedance of an ideal Op-Amp is _____________.
a) infinity b) zero c) very high d) very low
25. The output
impedance of an ideal Op-Amp is _____________.
a) infinity b) zero c) very
high d)
very low
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