Question: The reading of polar type a.c potentiometer when measuring the reactance of a coil areI = 12 <strong>∠</strong>13.8° , V =27.8 <strong>∠</strong>29.7°.The reactance of the coil is :
Answer:
MCQ: The reading of polar type a.c potentiometer when measuring the reactance of a coil areI = 12 <strong>∠</strong>13.8° , V =27.8 <strong>∠</strong>29.7°.The reactance of the coil is :
Correct Answer:
A. 2.317Ω
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Related Questions
- 1. A Coordinate type potentiometer is used for determination of impedance of a coil and the results obtained are: voltage across 1Ω resistance in series with coil, 0.24 V on in phase dial and -0.09 on quadrature dial.The resistance of the coil is:
- 2. The transfer instrument which is used for standardisation of a polar-type ac potentiometer is
- 3. A dc potentiometer is designed to measure up to about 2 volts with a slide wire of 800 mm. A standard cell of emf 1.18 volt obtains balance at 600 mm. a test cell is seen to obtained balance at 680 mm. The emf of the test cell is
- 4. For measuring an ac voltage by an ac potentiometer, it is desirable that the supply for the potentiometer is taken from
- 5. The calibration of a voltmeter can be carried out by using
- 6. A slide wire potentiometer has 10 wires of 1 m each. With the help of a standard voltage source of 1.018 volt it is standardise by keeping the jockey at 101.8 cm. If the resistance of the potentiometer wire is 1000 Ω then the value of the working current is
- 7. The potentiometer is standardised for making it
- 8. Consider the following statements.A dc potentiometer is the best means available for the measurement of dc voltage because <ol> <li>The precision in measurement is independent of the type of detector used</li> <li>It is based on null balance technique</li> <li>It is possible to standardize before a measurement is undertaken</li> <li>It is possible to measure dc voltages ranging in value from mV to hundreds of volts Of these statements,</li> </ol>
- 9. In a dc potentiometer measurements, a second reading is often taken after reversing the polarities of dc supply and the unknown voltage, and the average of the two readings is taken. This is with a view to eliminate the effects of
- 10. Please check figures here to answer the Questions from 1-3. <img class="aligncenter size-full wp-image-13089" style="width: 200px; height: 150px;" src="http://examradar.com/wp-content/uploads/2021/04/fig-AC-Birdges-1.png" alt="" />in order that the bridge shown in fig be balanced
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