A three-phase ∆-connected generator is driving a balanced load such that each phase current is 12 A in magnitude. When Iθa = 12 ∠30° A, what are the polar expressions for the other phase currents?
A. Iθb = 12 ∠150° A, Iθc = 12 ∠-90° A
B. Iθb = 12 ∠120° A, Iθc = 12 ∠30° A
C. Iθb = 12 ∠30° A, Iθc = 12 ∠120° A
D. Iθb = 12∠ 90° A, Iθc = 12 ∠90° A
Answer: Option A
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Related Questions on Three Phase Systems In Power Applications
In a Y-connected source feeding a ∆-connected load,
A. Each phase of the load has one-third of the full line voltage across it
B. Each phase of the load has two-thirds of the full line voltage across it
C. Each phase of the load has the full line voltage across it
D. Each phase of the load has a voltage across it equal to $$\sqrt 3 $$
A. Single-phase 32 A; three-phase 16 A
B. Single-phase 16 A; three-phase 8 A
C. Single-phase 8 A; three-phase 4 A
D. Single-phase 16 A; three-phase 0 A
I θa = 12 ∠30° A
Angle difference between each phase is 120
I θb = 12 ∠(30+120)° A= 12 ∠150° A
I θc = 12 ∠(30-120)° A=12 ∠-90° A