1
GATE EE 2023
MCQ (Single Correct Answer)
+2
-0.67

A 3-phase, star-connected, balanced load is supplied from a 3-phase, 400 V (rms), balanced voltage source with phase sequence R-Y-B, as shown in the figure. If the wattmeter reading is $$-$$400 W and the line current is $$I_R=2$$ A (rms), then the power factor of the load per phase is

GATE EE 2023 Electric Circuits - Three Phase Circuits Question 7 English

A
Unity
B
0.5 leading
C
0.866 leading
D
0.707 lagging
2
GATE EE 2023
Numerical
+2
-0

A balanced delta connected load consisting of the series connection of one resistor (R = 15 $$\Omega$$) and a capacitor (C = 212.21 $$\mu$$F) in each phase is connected to three-phase, 50 Hz, 415 V supply terminals through a line having an inductance of L = 31.83 mH per phase, as shown in the figure. Considering the change in the supply terminal voltage with loading to be negligible, the magnitude of the voltage across the terminals $$V_{AB}$$ in Volts is ___________ (Round off to the nearest integer).

GATE EE 2023 Electric Circuits - Three Phase Circuits Question 6 English

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3
GATE EE 2017 Set 2
MCQ (Single Correct Answer)
+2
-0.6
For the balanced Y-Y connected 3-Phase circuit shown in the figure below, the line-line voltage is 208 V rms and the total power absorbed by the load is 432 W at a power factor of 0.6 leading. GATE EE 2017 Set 2 Electric Circuits - Three Phase Circuits Question 14 English The approximate value of the impedance Z is
A
$$33\angle-53.1^\circ\;\Omega$$
B
$$60\angle53.1^\circ\;\Omega$$
C
$$60\angle-53.1^\circ\;\Omega$$
D
$$180\angle-53.1^\circ\;\Omega$$
4
GATE EE 2007
MCQ (Single Correct Answer)
+2
-0.6
A three phase balanced star connected voltage source with frequency $$\omega \,\,rad/s$$ is connected to a star connected balanced load which is purely inductive. The instantaneous line currents and phase to neutral voltages are denoted by $$\left( {{i_a},{i_b},{i_c}} \right)$$ and $$\left( {{V_{an}},\,\,{V_{bn}},\,\,{V_{cn}}} \right)$$ respectively and their $$rms$$ values are denoted by $$V$$ and $$1.$$ If $$$R = \left[ {{V_{an}}\,\,{V_{bn}}\,\,{V_{cn}}} \right]\left[ {\matrix{ 0 & {{1 \over {\sqrt 3 }}} & { - {1 \over {\sqrt 3 }}} \cr { - {1 \over {\sqrt 3 }}} & 0 & {{1 \over {\sqrt 3 }}} \cr {{1 \over {\sqrt 3 }}} & { - {1 \over {\sqrt 3 }}} & 0 \cr } } \right]\left[ {\matrix{ {{i_a}} \cr {{i_b}} \cr {{i_c}} \cr } } \right],$$$
then the magnitude of $$R$$ is
A
$$3$$ $$V{\rm I}$$
B
$$V{\rm I}$$
C
$$0.7$$ $$V{\rm I}$$
D
$$0$$
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