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Q = 2000 VAR, pf = 0.9 (leading). The power in complex form is

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Q = 2000 VAR, pf = 0.9 (leading). The power in complex form is

(a) 4129.8  j2000 VA

(b) 2000  j4129.8 VA

(c) 2000  j41.29.8 VA

(d) 4129.8  j2000 VA

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The above asked question is from Sinusoidal Steady State Analysis in division Signals and Amplifiers of Electronic Devices & Circuits

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The correct answer is (d) 4129.8  j2000 VA

Explanation: Use cos T = 0.9 or T = 25.84 degrees.

Q = S sin T or S = 4588.6 VA

p = S cos T or P = 0.9 X 4588.6 4129.8 VA.

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