alleryStart learning →Power factor in AC circuit is:
AV/I
Btan φ
Csin φ
Dcos φ where φ is phase angle between V and I
Answer & Solution
Correct answer: D. cos φ where φ is phase angle between V and I
Power factor (pf) = cos φ.
**For pure R:** pf = 1 (unity).
**Pure L or C:** pf = 0 (reactive).
**Lagging pf:** inductive load. Leading: capacitive.
**Average power:** P = V_rms I_rms cos φ.
**Reactive power:** Q = V_rms I_rms sin φ.
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