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Measurement and Instrumentation

Measurement and Instrumentation
A PMMC voltmeter is connected across a series combination of a DC voltage source V1 = 2 V and an AC voltage source V2 = 3sin4t, the voltmeters reads

 2 V.
 5 V.
 (2 + √3/2)V.
 0 V.

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Measurement and Instrumentation
In a dynamometer wattmeter, the moving coil is the

Current coil and potential coil
Current coil
None of the listed here
Potential coil

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Measurement and Instrumentation
Deflection method direct measurements are most widely used as these are

 least time consuming.
 most simple.
 most simple and least time consuming.
 most accurate.

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Measurement and Instrumentation
To the y input of a CRO a signal defined by 10sin100t is applied. To the x input the signal 10cos100t is fed. The gain for both x-channel and y-channel is the same. The screen shows

 an ellipse.
 a straight line.
 sinisoidal.
  a circle.

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Measurement and Instrumentation
Commonly used standard capacitor is

Multiplate parallel plate type
Concentric cylindrical type
Spherical type
Electrostatic type

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Measurement and Instrumentation
The full-scale deflection current of an ammeter is 1 mA and its internal resistance is 100°hm. This is to have full deflection when 100V is measured. What is the value of series resistor to be used?

99.99 K ohms
100 K ohms
99.99 ohms
100 ohms

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