1
GATE EE 2002
+1
-0.3
The line to line input voltage to the $$3$$ phase, $$50$$ Hz, ac circuit shown in fig is $$100$$ $$V$$ $$r.m.s$$ Assuming that the phase sequence is $$RYB$$ the wattmeter would read.
A
$${W_1} = 886\,W\,\,\,$$ and $$\,\,\,{W_2} = 896\,W$$
B
$${W_1} = 500\,W\,\,\,$$ and $$\,\,\,{W_2} = 500\,W$$
C
$${W_1} = 0\,W\,\,\,$$ and $$\,\,\,{W_2} = 1000\,W$$
D
$${W_1} = 250\,W\,\,\,$$ and $$\,\,\,{W_2} = 750\,W$$
2
GATE EE 2001
+1
-0.3
The minimum number of wattmeter(s) required to measure 3 $$-$$ phase, 3 $$-$$ wire balanced or unbalanced power is
A
1
B
2
C
3
D
4
3
GATE EE 1999
+1
-0.3
Electro dynamic type watt meters have large errors while measuring power in a.c circuits at low power factor conditions, since the voltage across and the current though the
A
current coil are not in phase
B
current coil are not in quadrature
C
pressures coil are not in phase
D
pressure coil are not in quadrature.
4
GATE EE 1997
+1
-0.3
A dynamometer type wattmeter responds to the
A
average value of active power
B
average value of reactive power
C
peak value of active power
D
peak value of reactive power
EXAM MAP
Medical
NEET