Electro Magnetic Induction And Alternating Currents Question 36

Question: In an ac circuit, a resistance of R ohm is connected in series with an inductance L. If phase angle between voltage and current be 45°, the value of inductive reactance will be [MP PMT/PET 1998]

Options:

A) $ \frac{R}{4} $

B) $ \frac{R}{2} $

C) R

D) Cannot be found with the given data

Show Answer

Answer:

Correct Answer: C

Solution:

$ \tan \varphi =\frac{X_{L}}{R},\Rightarrow ,\tan 45^{o}=\frac{X_{L}}{R}=1,\Rightarrow ,X_{L}=R $



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