Measurement and Instrumentation
The resistance offered to the passage of an in-varying current by a column of mercury at the temperature of melting ice of mass 14.4521 gms of uniform cross-sectional area and length 106.3cm is

One ohm according to working standards
One international ohm
One ohm according to SI units
Standard ohm

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
A DC potentiometer is the best means available for the measurement of DC voltage because

  It is based on null balance technique.
 None of above.
 The precision in measurment is independent of the type of the defector used.
 It is possible to standardize before a measurement is undertaken.

ANSWER DOWNLOAD EXAMIANS APP

Measurement and Instrumentation
For power measurement of three phase circuit by two wattmeter method, when the value of power factor is less than 0.5 lagging

One of the wattmeters will read zero
Pressure coil of the wattmeter will become ineffective.
Both give the same readings
One of the wattmeter connections will have to be reversed

ANSWER DOWNLOAD EXAMIANS APP