1
GATE EE 2006
+1
-0.3
A sampling wattmeter (that computes power from simultaneously sampled values of voltage and current) is used to measure the average power of a load. The peak to peak voltage of the square wave is $$10V$$ and the current is triangular wave of $$5A$$ $$p$$-$$p$$ as shown in the figure. The period is $$20$$$$ms$$. The reading in $$W$$ will be A
$$0W$$
B
$$25W$$
C
$$50W$$
D
$$100W$$
2
GATE EE 2004
+1
-0.3
The circuit in fig is used to measure the power consumed by the load. The current coil and the voltage coil of the watt meter have $$0.02$$ $$\Omega$$ and $$1000$$ $$\Omega$$ resistance respectively. The measured power compared to the load power will be A
$$0.4\%$$ less
B
$$0.2\%$$ less
C
$$0.2\%$$ more
D
$$0.4\%$$ more
3
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 $$\,\,\,{W_2} = 750\,W$$
4
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
GATE EE Subjects
Electromagnetic Fields
Signals and Systems
Engineering Mathematics
General Aptitude
Power Electronics
Power System Analysis
Analog Electronics
Control Systems
Digital Electronics
Electrical Machines
Electric Circuits
Electrical and Electronics Measurement
EXAM MAP
Joint Entrance Examination