In an $A.C.$ circuit,a resistance '$R$' is connected in series with an inductance '$L$'. If the phase angle between voltage and current is $45^{\circ}$,the value of inductive reactance will be $(\tan 45^{\circ} = 1)$.
- A$R$
- B$\frac{R}{2}$
- C$\frac{R}{4}$
- D$\frac{R}{\sqrt{2}}$
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