GATE 2019 EE – Question 18

Electrical Machines · Single phase transformer: equivalent circuit, phasor diagram, open circuit and short circuit tests, regulation and efficiency · 1 mark · Multiple choice

A 5 kVA, 50 V/100 V, single-phase transformer has a secondary terminal voltage of 95 V when loaded. The regulation of the transformer is

4.5%
9%
5%
1%

Practise this question in The GATE Grind →

Show answer and explanation

Correct answer: (C) 5%

Explanation

The regulation is $\frac{V_{NL}-V_{FL}}{V_{NL}}\times100=\frac{100-95}{100}\times100=5\%$.