A two-phase generator is connected to two 90 Ω load resistors. Each coil generates 120 V ac. A common neutral line exists. How much current flows through the common neutral line?
Answer: Option D
Explanation:
There is 2 phase so voltage 120x120 = 14400. 2R = 90X90 = 8100. I = V/R. S0 = 14400/8100 = 1.77.
A constant load power means a uniform conversion of
Answer: Option B
In a Y-connected circuit, the magnitude of each line current is
Answer: Option C
You Can remember easily like word, SIDE. S - Star, I-Current, D-delta, E-emf(voltage). SI - in Star Connection Currents Are Same I(L) = I(Ph). DE- In Delta Connection emf(voltage) Are Same V(L) = V(Ph).
In a Y-Y source/load configuration, the
Answer: Option A
In a Star connection. Current remains same but line voltage is root 3 times of phase voltage. In a delta connection. Voltage reamins same but line current is root 3 times of phase current.
In a Δ-connected source feeding a Y-connected load,
Delta connection to starconection are equal to line voltage. vph=vl/3.
