Measurement and Instrumentation - Interview Questions | Exam2Win

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46. A universal RLC bridge uses

A. Maxwell bridge configuration for measurement of inductance and De Santas bridge for measurement of capacitance

B. Maxwell Wein bridge for measurement of inductance and modified De Santy's bridge for measurement of capacitance

C. Maxwell Wein bridge for measurement of inductance and Wein bridge for measurement of capacitance

D. Any of the above.

Explanation:

47. To avoid the effect of stray magnetic field in A.C. bridges we can use

A. magnetic screening

B. Wagner earthing device

C. wave filters

D. any of the above

Explanation:

48. 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

Explanation:

49. In an AC. co-ordinate potentiometer, the currents in the phase and quadrature potentiometer are adjusted to be

A. out of phase by 90�

B. out of phase by 60�

C. out of phase by 30�

D. out of phase by 0�

Explanation:

50. 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

Explanation: