Q. Two wattmeter method of 3-phase power measurement can be used to find

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Q. The multiplier resistance and meter coil in a voltmeter are in

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Q. The adjustment of position of shading bands, in an energy meter, is done to provide

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Q. Assertion (A): CRO can be used to study waveshape accurately.

Reason (R): Input impedance of a CRO is very high.

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Q. LVDT is used to measure

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Q. The scale of PMMC instrument is linear.

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Q. Assertion (A): Thermistors are commonly used to measure hot spot temperatures in electric machines.

Reason (R): Thermistor has the advantages of high temperature coefficient, small size and high speed of response.

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Q. Absolute instruments are used in

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Q. Assertion (A): The sign and magnitude of displacement can be measured by an LVDT.

Reason (R): LVDT is based on the principle of mutual inductance.

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Q. In Maxwell's bridge the unknown inductance is measured by comparing it with a standard capacitor.

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Q. Magnetic deflection sensitivity is defined as

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Q. Which of the following is active transducer?

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Q. Which is the displacement transducer with excellent sensitivity, linearity and resolution?

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Q. If low pressure of 10¯⁶ mm of Hg is required to be measured, we should use

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Q. A transducer must have

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Q. If two time varying signals of equal magnitude and zero phase displacement are applied to X and Y plates respectively; of CRO, the display will be

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Q. Wagner earthing device is used to eliminate error due to

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Q. RTD is generally suitable for temperature up to

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Q. To measure an emf by dc potentiometer it is necessary to standardise the potentiometer with the help of a standard cell.

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Q. Which of the following transformers has low primary current?

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