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To measure an A. C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken
Which type of potentiometer consists of two separate potentiometer circuits enclosed in a common case?
In an AC co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be
A resistance R is measured using the connection shown in the below figure. The current measured is 10 A on ranges 100A and the voltage measured is 125 V on 150 V range. The scales of the ammeter and voltmeter are uniform. The total number of scale divisions of the ammeter is 100 and that of the voltmeter is 150. The scale division can be distinguished. The constructional error of the ammeter is ± 0.3% and that of voltmeter±0.4%. The resistance of the ammeter is 0.25 Ω. The possible error in the measurement of R is?
Which of the following devices cannot be used potentiometer as calibrating device?
A potentiometer cannot be used to:
A potentiometer cannot be used for calibration of ammeter.
Consider the following types of digital voltmeters: 1. Ramp type 2. Dual slope integrating type 3. Integrating type using voltage to frequency conversion 4. Successive approximation type 5. Servo balanced potentiometer type Which of these require a fixed reference voltage at the comparator stage?
Two sides of a rectangle were measured. One of the sides (length) was measured 10% more than its actual length and the other side (width) was measured 5% less than its actual length. The percentage error in measure obtained for the area of the rectangle is :
A team of six members is to be selected from five men M1, M2, M3 M4, and M5, and five women W1, W2, W3, W4, and W5. W2 and W5 cannot be selected together. M1 and W3 have to be selected together. W3 and W4 cannot be selected with M2. W1 and M5 cannot be selected together. M3 and M4 cannot be selected together. Which of the following members may be selected?