Question

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 C?

a.

Ra+Rb+Ra*Rb/Rc

b.

Ra+Rc+Ra*Rc/Rb

c.

Ra+Rb+Ra*Rc/Ra

d.

Ra+Rc+Ra*Rb/Rc

Answer: (b).Ra+Rc+Ra*Rc/Rb

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Q. 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 C?

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