Question

63. In an ac circuit, a resistance of R2 is connected in series
with an inductance L. If phase angle between voltage and
current be 45°, the value of inductive reactance will be
(a) R/4
(b) R/2
(c) R
(d) cannot be found with given data
.
please answer this question with solution.......​

Answer 1

Correct answer : (c)R

Solution :

The phasor diagram in L-R circuit is given in above attachment.

Given:- The phase angle between voltage and current .

ϕ = 45° .

So , tan ϕ = VL/VR= IXL/IR

Here, X1 = inductive reactance

⇒ tan 45°= XL/R

⇒1 =XL/R

=> XL= R

So, R is the value of inductive reactance.

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Hope it will help you

Answer 2

Answer:

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