Unbalanced Y-Connected Load Quiz Questions and Answers PDF - 17

MCQ 81: Current on phasor diagram of unbalanced Y-connected load has

1. no symmetry
2. symmetry
3. random variation
4. spikes

MCQ 82: If three impedances of Y and Δ connections are equal, than

1. Z_Δ⁄Z_Y=2
2. Z_Δ⁄Z_Y=3
3. Z_Δ⁄Z_Y=1
4. Z_Δ⁄Z_Y=1/2

MCQ 83: Three sinusoidal voltage sources of three phase generator are

1. 180° out of phase with each other
2. 120° out of phase with each other
3. 60° out of phase with each other
4. 90° out of phase with each other

MCQ 84: Three sinusoidal voltage sources of three phase generator have

1. inverse frequencies
2. random frequencies
3. infinite frequencies
4. same frequencies

MCQ 85: A certain passive network has equivalent impedance Z=3+j4 Ω and an applied voltage of v=42.5cos(1000t+30°), then reactive power of network is

1. 12.2 VAR
2. 144.5 VAR
3. 232.9 VAR
4. 543.3 VAR