1.

Ra is resistance at A, Rb is resistance at B, Rc is resistance at C in star connection. After transforming to delta, what is resistance between A and B?

A. Rc+Rb+Ra*Rb/Rc
B. Ra+Rb+Ra*Rc/Rb
C. Ra+Rb+Ra*Rb/Rc
D. Ra+Rc+Ra*Rc/Rb
Answer» D. Ra+Rc+Ra*Rc/Rb


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