Answer to Question #204101 in Physics for Eve

Question

A single phase 100 VA, 120/24 V transformer has the following results from the

open-circuit and short-circuit tests.

Open circuit Short Circuit

Voltage 120V 6V

Current 0.1A 4.9A

Power 4.5W 16W

(a) Determine the circuit parameters (Rc, Xm, Req, Xeq) referred to the High

Voltage side. [8 Marks]

(b) Determine the efficiency of the transformer at full load with 0.8 power factor

lagging.

Answer 1

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