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DILKHUSH

· started a discussion

· 1 Months ago

error (Question: 332126.0 )

q positive for lagging var............so answer d right

Question:

In an ac circuit, V = (200 + j 40) V and I = (30 - j 10) A. The active and reactive power of the circuit are respectively

Options:
A)

6400 W, 800 VAR capacitive

B)

6400 W, 800 VAR inductive

C)

5600 W, 3200 VAR capacitive

D)

5600 W, 3200 VAR inductive

Solution:

Ans:(c)

V = 200 + j40

I = 30 - j10

S = VI* = (200 + j40) (30 + j10)

6000 + j2000 + j1200 – 400

S = 5600 + j3200

P = 5600, Q = 3200

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