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Q.1
CMRR is more in __________
Single ended amplifier
Differential amplifier
Inverting operational amplifier
Chopper amplifier
Q.2
If the current gain of the amplifier is X, its voltage gain is Y, then its power gain will be
X/Y
X*Y
X+Y
X-Y
Q.3
An ammeter is connected in ___________ with the circuit element whose current we wish to measure
Series
Parallel
Series or parallel
None of the above
Q.4
If a multimeter has a sensitivity of 1000 Ω per volt and reads 50 V full scale, its internal resistance is ___________
20 kΩ
50 kΩ
10 kΩ
None of the above
Q.5
Raising input impedance of pre amplifier reduces
Input current
Output current
Stray current
Grid current
Q.6
Bonded wire strain gauges are
Exclusively used for construction of transducers
Exclusively used for stress analysis
Used for both stress analysis and construction of transducer
Pressure measurement
Q.7
An electrometer amplifier has high input impedance of
10¹⁰Ω
10¹²Ω
10²⁰Ω
10¹⁴Ω
Q.8
Venturi is associated with
Venous blood pressure
Digital plethysmography
Dialysate flow in artificial kidney
Blood flow in heart lung machine
Q.9
Power amplifier is provided with
S1: Cross over distortion compensation
S2: Offset control
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.10
The draw backs of strain gauges are
S1: Low fatigue life
S2: They are expensive, brittle and sensitive to temperature
S3: Poor linearity
S1 and S2
S2 and S3
S1 and S3
S1 only
Q.11
A ___________ is usually a display device used to produce a paper record of analog wave form.
Graphic pen recorder
Electron microscope
X-Y recorder
Oscilloscope
Q.12
____________ fiber is used in interferometric instruments.
Monomode
Multimode
Birefringent
Coated
Q.13
S1: Transducer is a device which converts physical into electrical quantity
S2: Transducer is also called as sensor.
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.14
The principle of operation of variable resistance transducer is
Deformation leads to change in resistance
Displacement of a contact slider on a resistance
Coupling of two coils changes with displacement
Movement of magnetic field produces variation in resistance of material
Q.15
A VTVM has ___________ input resistance than that of a multimeter
More
Less
Same
None of the above
Q.16
Piezo-electric transducers are
Passive transducers
Inverse transducers
Digital transducers
Pulse transducers
Q.17
The amplifier which has no drift is called as
Differential amplifier
DC amplifier
Single ended amplifier
Chopper amplifier
Q.18
Function of microscope is
S1: To magnify object, under observation
S2: To resolve the object
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.19
In wire wound strain gauges, the change in resistance is due to
Change in diameter of the wire
Change in length of the wire
Change in both length and diameter
Change in resistivity
Q.20
Isolation amplifiers are also called as
DC amplifier
Output amplifier
Inverting amplifier
Iso-amps
Q.21
A galvanometer in series with a high resistance is called ___________.
An ammeter
A voltmeter
A wattmeter
None of the above
Q.22
The decibel is a measure of
Current
Voltage
Power
Power level
Q.23
When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in
Common mode
Differential mode
Non inverting mode
Inverting mode
Q.24
When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in
Single ended mode
Differential mode
Non inverting mode
Inverting mode
Q.25
The writing speed of fast storage oscilloscope is
2000 cm/s
1000 cm/s
1500 cm/s
2500 cm/s
Q.26
Resolution of a transducer depends on
Material of wire
Length of wire
Diameter of wire
Excitation voltage
Q.27
The use of storage oscilloscope
S1: Viewing rapidly changing non repetitive wave forms
S2: Recording average values
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.28
Fidelity represents
S1: Reproduction of signal
S2: Reproduction of phase relation
S1 and S2 are true
S1 and S2 are false
S1 false and S2 true
S1 true and S2 false
Q.29
In an amplifier, the coupling capacitors are employed for
Limiting the bandwidth
Matching the impedance
Preventing of Dc mixing with input or output
Controlling the output
Q.30
Resistively generated inference arises through incorrect __________________.
Grounding
Current density at the electrodes
Supply voltage
Input impedance
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