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Measurement and Instrumentation

Measurement and Instrumentation
In a moving coil instrument, the deflecting torque is proportional to

Current
Square of the current
Squareroot of the current
Sine of the measurand

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Measurement and Instrumentation
A DC A-h meter is rated for 15 A, 250 V. The meter constant is 14.4 A-sec/rev. The meter constant at rated voltage may be expressed as

 1000 rev/KWh.
 3750 rev/KWh.
 3600 rev/KWh.
 960 rev/KWh.

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Measurement and Instrumentation
A CRO probe has an impedance of 500 kΩ in parallel with a capacitance of 10 pF. The probe is used to measure the voltage between P and Q as shown in figure. The measured voltage will be

 3.53 V.
 5 V.
 4.54 V.
 4.38 V.

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Measurement and Instrumentation
Induction wattmeter can measure

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

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Measurement and Instrumentation
Which of the following quantities consists of S.I. unit as Hertz?

 Frequency
 Force
 Charge
 Power

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Measurement and Instrumentation
Which of the following cannot be measured by multimeters?

Frequency
Resistance
Voltage
Current

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