1
GATE EE 2018
+1
-0.33
Two wattmeter method is used for measurement of power in a balanced three-phase load supplied from a balanced three-phase system. If one of the wattmeters reads half of the other (both positive), then the power factor of the load is
A
0.532
B
0.632
C
0.707
D
0.866
2
GATE EE 2015 Set 2
+1
-0.3
A 3-phase balanced load which has a power factor of 0.707 is connected to a balanced supply. The power consumed by the load is 5 kW. The power is measured by the two-wattmeter method. The readings of the two wattmeters are
A
3.94 kW and 1.06 kW
B
2.50 kW and 2.50 kW
C
5.00 kW and 0.00 kW
D
2.96 kW and 2.04 kW
3
GATE EE 2014 Set 3
Numerical
+1
-0
An $$LPF$$ wattmeter of power factor $$0.2$$ is having three voltage settings $$300V,$$ $$150V$$ and $$75V,$$ and two current settings $$5 A$$ and $$10A.$$ The full scale reading is $$150.$$ If the wattmeter is used with $$150V$$ voltage setting and $$10A$$ current setting, the multiplying factor of the wattmeter is __________.
4
GATE EE 2014 Set 2
Numerical
+1
-0
While measuring power of a three-phase balanced load by the two-wattmeter method, the readings are $$100$$ $$W$$ and $$250$$ $$W$$. The power factor of the load is ___________.