The self inductance of the primary winding of a single phase, 50 Hz, transformer is 800 mH, and that of the secondary winding is 600 mH. The mutual inductance between these two windings is 480 mH. The secondary winding of this transformer is short circuited and the primary winding is connected to a 50 Hz, single phase, sinusoidal voltage source. The current flowing in both the winding is less than their respective rated currents. The resistance of both windings can be neglected. In this connection, what is the effective inductance (in mH) seen by the source?

GATE 2015 Electrical Engineering PYQ — Electrical Machines

GATE 2015Set 1PYQMCQanswer keyexplanation soonmedium

Electrical Machines · Transformers

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Drill mode: mutual inductance · 5/9

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Recurring concept

Transformers has appeared in GATE Electrical Engineering 91 times across 31 years (2021, 2023, 2024, 2025, 2026, ...).