Using mechanical chopper we cannot achieve high chopping rates due to their
A. Input impedance
B. Output impedance
C. Response time
D. Inertia
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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 ___________.
A. nG
B. (n - 1)G
C. n − 1 G
D. n G
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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 ___________.
A. nG
B. n G
C. n − 1 G
D. (n - 1)G
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_____________ is also known as halftone storage or mersh storage.
A. Variable persistence storage
B. Bistable storage
C. Flat storage
D. CRT
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The sensitivity of a multimeter is given in ___________.
A. Ω
B. Amperes
C. V k Ω
D. None of the above
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An electrometer amplifier has high input impedance of
A. 1010 Ω
B. 1012 Ω
C. 1020 Ω
D. 1014 Ω
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Venturi is associated with
A. Venous blood pressure
B. Digital plethysmography
C. Dialysate flow in artificial kidney
D. Blood flow in heart lung machine
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The decibel is a measure of
A. Current
B. Voltage
C. Power
D. Power level
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When the input of differential amplifier V1 = 0, then the differential amplifier is said to be operated in
A. Common mode
B. Differential mode
C. Non inverting mode
D. Inverting mode
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When either one of the inputs to the differential amplifier is equal to zero then it is said to be operated in
A. Single ended mode
B. Differential mode
C. Non inverting mode
D. Inverting mode
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The _________ of a recording system is the magnitude of input voltage required to produce a standard deflection in a recorded trace.
A. Accuracy
B. Linearity
C. Sensitivity
D. Resolution
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Pre amplifier isolation in ECG circuit is to
A. Increase input impedance
B. Decrease input impedance
C. Increase output impedance
D. Decrease output impedance
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LVDT windings are wound on
A. Steel sheets
B. Aluminium
C. Ferrite
D. Copper
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The input resistance of a VTVM is about ___________.
A. 1000 Ω
B. 10 kΩ
C. 20 kΩ
D. 10 MΩ
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When a number of components are fabricated on same IC chip it is necessary to provide isolation between two different components for input interconnection is called __________.
A. Input amplification
B. Input differentiation
C. Common mode rejection
D. Input isolation
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Piezo electric crystal can produce an emf
A. When external mechanical force is applied to i
B. When radiant energy stimulates the crystal
C. When external magnetic field is applied
D. When the junction of two such crystals are heated
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A strain gauge is a passive transducer and is employed for converting.
A. Mechanical displacement into a change of resistance
B. Pressure into a change of resistance
C. Force into a displacement
D. Pressure into displacement
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The most accurate device for measuring voltage is ___________.
A. Voltmeter
B. Multimeter
C. CRO
D. VTVM
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Photo multiplier consists of
A. 1 Photo emissive cathode & 2 dynodes
B. 2 Photo emissive cathodes & 2 dynodes
C. 2 Photo emissive cathodes & 1 dynode
D. 1 Photo emissive cathode & 1 dynode
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For biomedical applications the mostly used amplifier is
A. Single ended amplifier
B. Differential amplifier
C. Inverting operational amplifier
D. Chopper amplifier
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