1
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 ___________.
2
GATE EE 2014 Set 1
+1
-0.3
Power consumed by a balanced $$3$$-phase, $$3$$-wire load is measured by the two wattmeter method. The first wattmeter reads twice that of the second. Then the load impedance angle in radians is
A
$${\pi \over 2}$$
B
$${\pi \over 8}$$
C
$${\pi \over 6}$$
D
$${\pi \over 3}$$
3
GATE EE 2012
+1
-0.3
For the circuit shown in the figure, the voltage and current expressions are
$$v\left( t \right) = {E_1}\sin \left( {\omega t} \right) + {E_3}\sin \left( {3\omega t} \right)$$ and
$$i\left( t \right) = {{\rm I}_1}\sin \left( {\omega t - {\varphi _1}} \right) + {{\rm I}_3}\sin \left( {3\omega t - {\varphi _3}} \right) + {{\rm I}_5}\sin \left( {5\omega t} \right)$$

The average power measured by the Wattmeter is A
$${1 \over 2}{E_1}{{\rm I}_1}\cos {\phi _1}$$
B
$${1 \over 2}\left[ {{E_1}{{\rm I}_1}\cos {\phi _1} + {E_1}{{\rm I}_3}\cos {\phi _3} + {E_1}{{\rm I}_5}} \right]$$
C
$${1 \over 2}\left[ {{E_1}{{\rm I}_1}\cos {\phi _1} + {E_3}{{\rm I}_3}\cos {\phi _3}} \right]$$
D
$${1 \over 2}\left[ {{E_1}{{\rm I}_1}\cos {\phi _1} + {E_3}{{\rm I}_1}\cos {\phi _1}} \right]$$
4
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
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