Potentiometer Multiple Choice Questions and Answers

26. Basically a potentiometer is a device for

   A.Comparing two voltages

   B.Measuring a current

   C.Comparing two currents

   D.Measuring a voltage

   E.None of the above

27. In order to achieve high accuracy, the slide wire of a potentiometer should be

   A.As long as possible

   B.As short as possible

   C.Neither too small not too large

   D.Very thick

28. To measure an A.C. voltage by using an A.C. potentiometer, it is desirable that the supply for the potentiometer in taken

   A.From a source which is not the same as the unknown voltage

   B.From a battery

   C.From the same source as the unknown voltage

   D.Any of the above

29. The stator of phase shifting transformer for use in conjunction with an A.C. potentiometer usually has a

   A.Single-phase winding

   B.Two-phase winding

   C.Three-phase winding

   D.Any of the above

30. In an A.C. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be

   A.Out of phase by 90⁰

   B.Out of phase by 60⁰

   C.Out of phase by 30⁰

   D.Out of phase by 0⁰

   E.Out of phase by 180⁰

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