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 $
