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In the following network, the voltage magnitudes at all buses are equal to $1 p.u.$, the voltage phase angles are very small, and the line resistances are negligible. All the line reactances are equal to $j1$ $\Omega.$

The voltage phase angles in rad at buses $2$ and $3$ are

- $\theta _2=-0.1,\theta _3=-0.2$
- $\theta _2=0,\theta _3=-0.1$
- $\theta _2=0.1,\theta _3=0.1$
- $\theta _2=0.1,\theta _3=0.2$

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