Electro Magnetic Induction And Alternating Currents Question 24

Question: The impedance of a circuit consists of 3 ohm resistance and 4 ohm reactance. The power factor of the circuit is [MP PMT 1994]

Options:

A) 0.4

B) 0.6

C) 0.8

D) 1.0

Show Answer

Answer:

Correct Answer: B

Solution:

$ Z=\sqrt{R^{2}+X^{2}}=\sqrt{4^{2}+3^{2}}=5 $
$ \therefore \cos \varphi =\frac{R}{Z}=\frac{3}{5}=0.6 $



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