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Measurement and Instrumentation

Measurement and Instrumentation
Which instrument has identical calibration for ac as well as dc values?

Induction type
Hot wire type
Moving coil type
Moving iron type

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Measurement and Instrumentation
A DC potentiometer is designed to measure up to about 2V with a slide wire of 800 mm. A standard cell of emf 1.18 V obtains balances at 600 mm. A test cell is seen to obtain balance at 680 mm. The emf of test cell is

 1 V.
 1.7 V.
 1.34 V.
 1.5 V.

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Measurement and Instrumentation
In a portable instrument , the controlling torque is provided by

All of the listed here
Eddy currents
Gravity
Spring

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Measurement and Instrumentation
Which of the quantity consists of unit as Pascal ?

 Pressure
 Temperature
 Impulse
 Force

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Measurement and Instrumentation
The coil of a moving iron instrument has a resistance of 500 ohm and inductance of 1 H. It reads 250 V when a 250 V DC is applied. It series resistance is 2000 ohms its reading when fed by 250 V, 50 Hz AC will be

 260 V.
 252 V.
 250 V.
 248 V.

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Measurement and Instrumentation
In figure Z1 = 200∠60° ohm. Z2 = 400∠-90° ohm, Z3 = 300∠0° ohm. Then Z4 for bridge to be balanced is

 150∠30° ohm.
 400∠-90° ohm.
 600∠-150° ohm.
 300∠90° ohm.

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