A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are: A. 450 V, 15 A C. 600 V, 15 A B. 450 V, 13.5 A D.300 V, 15 A

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A, the voltage across the secondary coil and the current in the primary coil respectively are: A. 450 V, 15 A C. 600 V, 15 A B. 450 V, 13.5 A D.300 V, 15 A

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter27: Single-phase Transformers

Section: Chapter Questions

Problem 4RQ: All values of a transformer are proportional to its __________________ ___________________.

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Concept explainers

Single Phase Transformer

A single-phase transformer is a type of power transformer. It is an electrical device that accepts converts the single phase alternating power into single phase alternating power. In this power conversion the voltage is stepped up or down. If the voltage is stepped up, the current will be stepped down and if the voltage is stepped down, the current will be stepped up.

Question

A transformer having efficiency of 90% is working on 200 V and 3 kW power supply. If the current in the secondary coil is 6 A,
the voltage across the secondary coil and the current in the primary coil respectively are:
A. 450 V, 15 A
C. 600 V, 15 A
B. 450 V, 13.5 A
D.300 V, 15 A

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