MCQOPTIONS
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MCQOPTIONS
| 1. |
If a resistor ZR is connected between R and N, ZBR between R and B, ZRY between R and Y and ZBY between B and Y form a delta connection, then after transformation to star, the impedance at R is? |
| A. | (ZBRZBY)/(ZRY+ZBY+ZBR) |
| B. | (ZRYZBR)/(ZRY+ZBY+ZBR) |
| C. | (ZRYZBY)/(ZRY+ZBY+ZBR) |
| D. | (ZRY)/(ZRY+ZBY+ZBR) |
| Answer» C. (ZRYZBY)/(ZRY+ZBY+ZBR) | |