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ECE :: Measurements and Instrumentation

Measurements and Instrumentation - Section 1
Measurements and Instrumentation - Section 2
Measurements and Instrumentation - Section 3
Measurements and Instrumentation - Section 4
Measurements and Instrumentation - Section 5
Measurements and Instrumentation - Section 6
Measurements and Instrumentation - Section 7
Measurements and Instrumentation - Section 8
Measurements and Instrumentation - Section 9
Measurements and Instrumentation - Section 10
Measurements and Instrumentation - section-11
Measurements and Instrumentation - Section-12

  1. Assertion (A): A photovoltaic cell is greatly affected by temperature.

    Reason (R): Both germanium and silicon can be used for photovoltaic cells.

    2. A.
    Both A and R are true and R is correct explanation of A
    B.
    Both A and R are true but R is not correct explanation of A
    C.
    A is true R is false
    D.
    A is false R is true

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  2. Wagner earthing device eliminates

    3. A.
    all stray capacitance in the circuit
    B.
    stray capacitances between components
    C.
    stray capacitance between detector terminal and ground
    D.
    mutual coupling between components

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  3. The deflection sensitivity of a CRO is generally expressed in

    4. A.
    meter/V
    B.
    cm/V
    C.
    V/meter
    D.
    V/cm

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  4. The response of D'Arsonval galvanometer is over damped if

    5. A.
    D2 > 4CJ
    B.
    D2 > 2CJ
    C.
    D2 < 4CJ
    D.
    D2 < 2CJ

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  5. In figure the values of Rx and Cx are

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  6. The material used in RTD is

    7. A.
    linear
    B.
    aluminium
    C.
    silver
    D.
    platinum

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  7. Basically a potentiometer is a device for

    8. A.
    comparing two votage
    B.
    measuring a voltage
    C.
    comparing two currents
    D.
    measuring a current

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  8. It is required to measure the true open circuit emf of a battery. The best device is

    9. A.
    dc voltmeter
    B.
    ammeter and known resistance
    C.
    dc potentiometer
    D.
    either (a) or (c)

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  9. If two time varying signals of equal magnitudes and 90° phase displacement are applied to X and Y plates of CRO, the display will be

    10. A.
    a straight line
    B.
    a circle
    C.
    an ellipse
    D.
    a rectangle

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  10. Measurement of non-electrical quantity involves the following subsystems

    1. Amplifier block
    2. Display block
    3. Instrumentation block
    4. Transducer block
    The correct sequence of these blocks is

    11. A.
    4, 1, 3, 2
    B.
    4, 3, 1, 2
    C.
    1, 3, 2, 4
    D.
    1, 2, 3, 4

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