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Quiz 3
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Q.1
A series ohmmeter circuit uses a 3 V battery and a 1 mA meter movement. What is the half-scale resistance for this movement?
3 kΩ
kΩ
kΩ
6 kΩ
Q.2
The size of air cored transducers in comparison to the iron core parts is
Smaller
Larger
Same
Unpredictable
Q.3
pH value of venous blood is
7.30
7.40
7.35
7.45
Q.4
The amplifier gain varies with frequency. This happens mainly due to
Miller effect
Presence of external and internal capacitance
Logarithmic increase in its output
Inter stage transformer
Q.5
The negative feed back in an amplifier
Reduces voltage gain
Increases the voltage gain
Increases the gain band width product
Reduces the input impedances
Q.6
The improper response time of the amplifier in the biomedical recorders
Affects the gain of the amplifier
Delays the signals
Changes the shape of the waveform of the signal
Attenuates the signals
Q.7
LVDT is an/a ___________ transducer.
Magneto-strict ion
Inductive
Resistive
Eddy current
Q.8
Piezo – electric transducers work when we apply _____________ to it.
Mechanical force
Vibrations
Illuminations
Heat
Q.9
Capacitive transducers are normally employed for___________ measurements.
Static
Dynamic
Transient
Both static and dynamic
Q.10
Self generating type transducers are ___________ transducers.
Active
Passive
Secondary
Inverse
Q.11
In a graded index fiber, the total reflected light takes a ___________.
Straight line path
Parabolic path
Elliptical path
Circular path
Q.12
The CMRR of a typical IC OPAMP is
70 dB
80 dB
85 dB
75 dB
Q.13
If the negative potential on the control grid of CRT is increased, the intensity of spot ___________.
Is increased
Is decreased
Remains the same
None of the above
Q.14
Isolation amplifier actually operates on the principle of
Filtering
Attenuation
Clipping
Amplification
Q.15
If the full-scale deflection current of a multimeter is 50 µA, its sensitivity is
10 kΩ/V
100 kΩ/V
50 kΩ/V
20 kΩ/V
Q.16
Which of the following is likely to have the largest resistance?
Voltmeter of range 10 V
Moving coil galvanometer
Ammeter of range 1 A
A copper wire of length 1 m and diameter 3 mm
Q.17
Feedback in an amplifier always helps in
Increasing its input impedance
Increasing its gain
Controlling its output
Stabilizes its gain
Q.18
The capacitance microphone is used for the detection of
Heart rate
Blood flow
Heart sound
Foot pressure
Q.19
The resolution limit of electron microscope is
2 V
1 A.V
1.5 A.V
1.2 A.V
Q.20
Which of the following are piezo electric substances?
1. Barium titanate
2. Lead titanate
3. Lead Zirconate
4. Cadmium and sulphate
1, 2 and 4
1, 3 and 4
1, 2 and 3
2, 3 and 4
Q.21
A chopper amplifier
Converts AC signal from low frequency to high frequency
Converts DC signal from low frequency to high frequency
Converts AC signal from low frequency to DC high frequency
Converts DC signal from low frequency to high frequency
Q.22
The sensitivity factor of strain gauge is normally of the order of
1 to 1.5
1.5 to 2.0
0.5 to 1.0
5 to 10
Q.23
The transducers that converts the input signal into the output signal, which is a discrete function of time is known as ___________ transducer.
Active
Analog
Digital
Pulse
Q.24
An ammeter should have ___________ resistance.
Infinite
Very large
Very low
None of the above
Q.25
A voltmeter should have ___________ resistance.
Zero
Very high
Very low
None of the above
Q.26
In PMMC writing system, the magnitude of pen deflection is proportional to
S1: Current flowing through the coil
S2: Voltage in the coil
S1 is true & S2 is false
S2 is true & S1 is false
Both S1 & S2 are true
Both S1 & S2 are false
Q.27
The horizontal plates of a CRO are supplied with ___________ to observe the waveform of signal.
Sinusoidal wave
Cosine wave
Sawtooth wave
None of the above
Q.28
Storage oscilloscope operates on the principle of
Primary emission
Deflection
Secondary emission
Diffusion
Q.29
The principle of operation of LVDT is based on the variation of
Self inductance
Mutual inductance
Reluctance
Permanence
Q.30
A VTVM is never used to measure ___________.
Voltage
Current
Resistance
None of the above
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