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Q.1
Photo conductive cell consists of a thin film of
Quartz
Lithium sulphate
Barium titanate
Selenium
Q.2
In a LVDT, the two secondary voltages
Are independent of the core position
Vary unequally depending on the core position
Vary equally depending on the core position
Are always in phase quadrature
Q.3
Test electrode is also known as
Indicator electrode
Reference electrode
Second electrode
Primary electrode
Q.4
If 2% of the main current is to be passed through a galvanometer of resistance G, then resistance of the shunt required is ___________.
G/50
G/49
49 G
50 G
Q.5
To send 10% of the main current through a moving coil galvanometer of resistance 99 Ω the shunt required is ___________.
11 Ω
9 Ω
100 Ω
9 Ω
Q.6
The application of LVDT is
Joint motion
Finger movement
Limb movement
Heart wall motion
Q.7
Quartz and Rochelle salt belongs to ___________ of piezo-electric materials
Natural group
Synthetic group
Natural or Synthetic group
Fiber group
Q.8
Strain gauge, LVDT and thermocouple are examples of
Active transducers
Passive transducers
Analog transducers
Primary transducers
Q.9
Which of the following can be measured with the help of piezo electric crystal?
Force
Velocity
Sound
Pressure
Q.10
Using mechanical chopper we cannot achieve high chopping rates due to their
Input impedance
Output impedance
Response time
Inertia
Q.11
An ammeter has a resistance of G ohms and range of I amperes. The value of resistance required in parallel to convert it into an ammeter of range nI is ___________.
nG
(n-1)G
G/(n-1)
G/n
Q.12
A voltmeter has a resistance of G ohms and range V volts. The value of resistance required in series to convert it into voltmeter of range nV is ___________.
nG
G/n
G/(n-1)
(n-1)G
Q.13
_____________ is also known as halftone storage or mersh storage.
Variable persistence storage
Bistable storage
Flat storage
CRT
Q.14
The sensitivity of a multimeter is given in ___________.
O
Amperes
kΩ/V
none of the above
Q.15
Silver chloride electrode is used as a reference electrode due to its
Large half cell potential
Stable half cell potential
Stable resting potential
Stable action potential
Q.16
In X-Y recorders, the self balancing potentiometers plot emf as a function of
Another emf
Frequency
Time
Pressure
Q.17
A voltmeter is connected in a ___________ with the circuit component across which potential difference is to be measured.
Parallel
Series
Series or parallel
None of the above
Q.18
The slewing speed of X-Y recorder is
1.6 m/s
1.3 m/s
1.4 m/s
1.5 m/s
Q.19
In strip chart recorders, the self balancing potentiometers plot emf as a function of
Another emf
Frequency
Time
Pressure
Q.20
When an ammeter is inserted in the circuit, the circuit current will ___________.
Increase
Decrease
Remain the same
None of the above
Q.21
The resistance of LDR ____________ when exposed to radiant energy.
Remains unaltered
Increases
Reaches maximum
Decreases
Q.22
Fiber optic sensor can be used to sense ____________.
Displacement
Power
Current
Resistance
Q.23
Most commonly used indicator electrode is
Calomel electrode
Silver electrode
Silver – Silver chloride electrode
Glass electrode
Q.24
A recorder is said to have good frequency response when the sensitivity of the system is _________ for all frequencies present in the signal.
Unity
Zero
Infinity
Constant
Q.25
To reduce common mode interference during recording of bio signals one can use __________.
Buffer amplifier
Differential amplifier
Single ended amplifier
Chopper amplifier
Q.26
The change in resistance of a metal wire owing to strain is due to
S1: Change in dimension of wire expressed by factor (1-2µ)
S2: Change in resistance ?
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.27
An ideal ammeter has ___________ resistance.
Low
Infinite
Zero
High
Q.28
Stress and strain curves are plotted using
Magnetic tape recording
X-Y recording
Galvanometric
PMMC writing systems
Q.29
An inverse transducer is a device which converts
An electrical quantity into a non electrical quantity
Electrical quantity into mechanical quantity
Electrical energy into thermal energy
Electrical energy into light energy
Q.30
The materil used to coat inside the face of CRT is ___________.
Carbon
Sulphur
Silicon
Phosphorous
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