1. only single phase meters
2. only 3 phase meters
3. both single and three phase meters
4. none of these
only single phase meters
1. connecting the ammeter on the side of unknown resistance as this connection
2. connection the voltmeter on the side of unknown resistance as this connection gives batter accuracy
3. any of the two connection, as both of them give equal accuracy
4. none of these
connecting the ammeter on the side of unknown resistance as this connection
1. watt
2. milliwatt
3. microwatt
4. nanowatt
nanowatt
1. to increase sensitivity
2. that the second thermocouple cancels out the no-linear effects of the first thermocouple
3. to prevent drift in the d.c. amplifier
4. all of these
that the second thermocouple cancels out the no-linear effects of the first thermocouple
1. 20.12
2. 20.2
3. 200.2
4. none of these
20.12
1. 0.650
2. 0.3050
3. 0.4960
4. none of these
none of these
1. high permeability and low loss core materials, avoiding any joints. in the core and also keeping the flux density to a low value
2. using primary and secondary windings as close to each other as possible
3. using large cross-sections for both primary and secondary winding conductors
4. all of these
high permeability and low loss core materials, avoiding any joints. in the core and also keeping the flux density to a low value
1. phase angle error
2. both ratio and phase angle errors
3. ratio error reduction in phase error is incidental
4. none of these
ratio error reduction in phase error is incidental
1. increasing the exciting current
2. increasing the resistance and leakage reactance in the transformer
3. by not employing turns compensation
4. none of these
none of these
1. for primary winding phase voltages above 100 kV
2. for keeping the value of transformation ratio constant irrespective of the burden by making certain adjustment
3. because they are cheaper than the electromagnetic trans-formers above a certain voltage range
4. all of these
for keeping the value of transformation ratio constant irrespective of the burden by making certain adjustment