Table 1 shows the equivalent Star and equivalent Delta resistances.

Table . 1 |

**Example 1**: Convert the given Delta in the Fig. 1 into equivalent Star.

Fig. 2 |

**Solution**: Its equivalent Star is as shown in the Fig. 2.

Where

R

_{1 }= (10 x 5 )/(5 +10 + 15) = 1.67 ΩR

_{2 }= (15 x 10)/(5 +10 + 15) = 5 ΩR

_{3 }= (5 + 15)/(5 + 10 + 15) = 2.5 ΩFig. 3 |

**Example 2**.: Find equivalent resistance between points A-B.

Fig. 4 |

**Solution**: Redrawing the circuit,

Fig. 4(a |

Fig. 4(b |

R

_{AB }= (21 x 14)/(21 + 14) = 8.4 Ω**Example 3**: Find equivalent resistance between point A-B.

Fig. 5 |

**Solution**: Redraw the circuit,

Fig. 5(a |

Fig. 5(b |

R

_{AB }= 8.4 Ω
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