1
GATE EE 2011
+1
-0.3
Consider the following statement:
(i) The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the current coil.
(ii) The compensating coil of a low power factor wattmeter compensates the effect of the impedance of the voltage coil circuit.
A
(i) is true but (ii) is false
B
(i) is false but (ii) is true
C
both (i) and (ii) are true
D
both (i) and (ii) are false
2
GATE EE 2010
+1
-0.3
A wattmeter is connected as shown in the fig. the wattmeter reads
A
zero always
B
Total power consumed by $${Z_1}$$ & $${Z_2}$$
C
Power consumed by $${Z_1}$$
D
Power consumed by $${Z_2}$$
3
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
$$100W$$
4
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
EXAM MAP
Medical
NEET