Question

A 20 kVA, 2000-V/200-V single-phase transformer has equivalent per unit impedance of
(0.025 + 30.04) 2. The copper loss of the transformer at rated load current is
[A] 800 W
[B] 2.5 W
[C]
500 W
[D] 8W​

Answer 1

Explanation:

How do you find the conjugate of a cubed root?

Since we have a cube root in the numerator, we need to multiply by the cube root of an expression that will give us a perfect cube under the cube root in the numerator. Step 3: Simplify the fraction if needed. Step 1: Find the conjugate of the denominator. In general the conjugate of a + b is a - b and vice versa