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MEASUREMENT AND INSTRUMENTATION QUIZ

A bridge circuit is shown in the figure below. Which one of the sentence given below is most suitable for balancing the bridge?

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The resistance can be measured most accurately by

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The internal resistance of an ammeter should be

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The resistance of a circuit is measured from the relation R= P/I2, where P is the power fed into the circuit and I is the current flowing through it. If the limiting errors in the measurement of power and current are respectively ± 1.0% and ± 1.0%, then what will be the limiting error in measurement of resistance ?

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The resistance of a circuit is found by measuring current flowing and the power fed into the circuit. If the limiting errors in the measurement of power and current are ± 1.5% and ± 1.0% respectively, the limiting error in the measurement of resistance

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Assertion (A) : Precision is a necessary prerequisiteof accuracy. Reason (R) : Precision guarantees accuracy.

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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

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For measuring an AC voltage by an AC potentiometer it is desirable that the supply for the potentiometer is taken from

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It is found that 10A current passes through a resistor of 10°hms. The resistor has 5% tolerance . The error in measurement of current can be as high as 5%. What is max error in measurement of power, calculated from measured value of I and the nominal value of resistor?

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The operating voltage of a megger is about

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