A transformer is a device that transfers electrical energy from one circuit to another through inductively coupled conductors - the transformer's coils. A varying current in the first or primary winding creates a varying magnetic field through the secondary winding. This varying magnetic field induces a varying electromotive force (EMF) or "voltage" in the "secondary" winding. This effect is called mutual induction as discovered by Michael Faraday. Discuss Faraday's laws of electromagnetism (a) (b) A 5 KVA single-phase transformer has a turns ratio of 19:2 and is fed from a 3 kV supply. Neglecting losses, determine; (i) the full-load secondary current, (ii) the minimum load resistance which can be connected across the secondary winding to. give full load kVA, (iii) the primary current at full load kVA.