The question is find R Thevenien using Voltage test source across terminals a and b of the following circuit:(adsbygoogle = window.adsbygoogle || []).push({});

http://img255.imageshack.us/img255/8660/rthevenen.png [Broken]

I did it by adding a 20 test voltage source and used mesh to get the following 4 equations of the 4 meshes ( I deactivated the 480 V independent source to be able to use test voltage method)

M1:6(x-t) + 40(x-y)+4x=0

M2: 40(y-x)+20=0

M3: 80(z-t) - 20q +2z-20=0

M4:4t + 8(t-z) +6(t-x)=0

q=x-t

I R thevenen to be 11.55 but actually the correct answer is 12 ohms.

Where is my mistake.

**Physics Forums - The Fusion of Science and Community**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Help in finding R Thevenien?

Loading...

Similar Threads - Help finding Thevenien | Date |
---|---|

Help with finding vintage valve amplifier circuits (amplifiers for a rock band) | Apr 26, 2017 |

Help designing/finding a vendor for this magnetic field | Jan 25, 2017 |

Can someone help me find an On1/On2/Both On/Off mini switch? | Dec 25, 2016 |

Help finding a rotary encoder with interupt capabilities | Aug 25, 2016 |

Need help finding diode | Nov 20, 2015 |

**Physics Forums - The Fusion of Science and Community**