Measurement and Instrumentation
In measurement system, the function of the signal manipulating elements is to

 to perform non liner operation like clipping filtering, chopping and clamping.
 change the quantity under measurement to an analogues signal.
 change the magnitude of the input signal while retaining its identity.
 to perform linear operation like addition and multiplication.

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Measurement and Instrumentation
The measurment of very low and very high frequencies is invariably done using a frequency counter in which one of the following?

 Frequency measurment modes only.
 Period measurment modes only.
 Frequency and period measurment modes, respectively.
  Period and frequency measurement modes respectively.

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Measurement and Instrumentation
If an inductance L is connected in one arm of bridge and resistance R1, R2, R3 in other three arms

 The bridge is balanced for some specified value of R1, R2, R3.
 The bridge can be balanced.
 The bridge can not be balanced.
 The bridge is balanced for some specified value of frequency.

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