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JEE Main 2005
Exam
JEE Main
Year
2005
Subject
Physics
Chapter
Alternating Current

JEE Main 2005 · Physics · Alternating Current

A circuit has a resistance of 12 and an impedance of 15 . The power...

A circuit has a resistance of 12Ω12 \Omega and an impedance of 15Ω15 \Omega. The power factor of the circuit will be

Options

  1. A0.8
  2. B0.4
  3. C1.25
  4. D0.125

Correct answer

A. 0.8

Step-by-step solution

cos⁡ϕ=RZ=1215=45=0.8\cos \phi=\frac{R}{Z}=\frac{12}{15}=\frac{4}{5}=0.8
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