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BITSAT 2012
Exam
BITSAT
Year
2012
Subject
Physics
Chapter
Alternating Current

BITSAT 2012 · Physics · Alternating Current

The impedance of a circuit consists of 3 resistance and 4...

The impedance of a circuit consists of 3Ω3 \Omega resistance and 4Ω4 \Omega reactance. The power factor of the circuit is

Options

  1. A0.4
  2. B0.6
  3. C0.8
  4. D1

Correct answer

B. 0.6

Step-by-step solution

tan⁡ϕ=XR×43\tan \phi=\frac{\mathrm{X}}{\mathrm{R}} \times \frac{4}{3} Power factor =cos⁡ϕ=35=0.6=\cos \phi=\frac{3}{5}=0.6
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