ECE :: Measurements and Instrumentation
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The time base generator in a CRO gives an output which is
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The standard deviation σ in terms of n observations having deviations from mean dm can be written as
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An average responding rectifier type electronic voltmeter has its scale calibrated in terms of rms value of sine wave. If 100 V peak value square wave is fed to this voltmeter, the reading will be
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In low power factor wattmeter, the compensating coil is connected
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A permanent magnet moving coil measures
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A CT is used to feed current coils of wattmeter, energy meter, power factor meter and an ammeter. Then
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In measurements using strain gauge, the dummy strain gauge is used to
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In an ac single phase energy meter, the potential coil is put on
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The chemical effect of current is used in
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