Question: In a two phase (A C) servo motor, the rotor has resistance (mathrm{R}) and reactance (mathrm{X}). The torque speed characteristics of the servo motor will

In a two phase $A C$ servo motor, the rotor has resistance $\mathrm{R}$ and reactance $\mathrm{X}$. The torque speed characteristics of the servo motor will be linear provided that
(a) $\frac{\mathrm{X}}{\mathrm{R}}<<1$
(b) $\frac{X}{R} \gg 1$
(c) $\mathrm{X}^{2}=\mathrm{R}$
(d) $\frac{\mathrm{X}}{\mathrm{R}}=1$

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