Exam Question

(a) With the aid of delta and star connection diagrams, state the basic equation from which the delta-star and star-delta conversion equation can be derived

(b) Three batteries A, B, and C have their negative terminals connected together, between the positive terminals of A and B there is a resistor of 0.5 ohm and between B and C there is a resistor of 0.3 ohm.

Battery A 105V, internal resistance 0.25 ohm

Battery B 100V, internal resistance 0.2 ohm

Battery C 95V, internal resistance 0.25 ohm

Determine the current values in the two resistors and the power dissipated by them.