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Measurement and Instrumentation

Measurement and Instrumentation
Two capacitance, C1 = 150 ± 2.4µF and C2 = 120 ± 1.5 µF are connected in parallel. What is the limiting error of the resultant capacitance C (in µF) ?

 2.4µF
 3.9µF
 0.9µF
 1.5µF

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Measurement and Instrumentation
For the AC bridge circuit shown in figure at balance the value of Rd will be

 (Rc/Ra).Rb.
 (Rc/Rb).Ra.
 (Rb/Rc).Ra.
 (Ra/Rc).Rb.

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Measurement and Instrumentation
A Lissajous pattern on an oscilloscope has 5 horinzontal tangencies and 2 vertical tangencies. The frequency of horizontal input is 100 Hz. The frequency of the vertical will be

 250 Hz.
 400 Hz.
 625 Hz.
 500 Hz.

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Measurement and Instrumentation
Induction wattmeter can measure

Both AC and DC
Dc power only
None of the listed here
Ac power only

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Measurement and Instrumentation
The errors mainly caused by human mistakes are

  gross error.
 instrumental error.
 systematic error.
 observational error.

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Measurement and Instrumentation
Two voltmeters have the same range 0-400V. The internal impedance are 30,000 Ohms and 20,000 Ohms. If they are connected in series and 600V be applied across them, the readings are

400V and 200V
One of the meters out of the range and other 100V
360V and 240V
300V each

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