An 10000/100V, 50 Hz, single phase transformer has an exciting current of 0.8 A and a core loss of 400 W when its HV side is energized at rated voltage. The core loss component of the existing current is ?

The core loss of a 5KVA single phase transformer with normal voltage applied to the primary is 74 watts. The maximum efficiency occurs at 70% of full-load KVA. What is the full load efficiency of the transformer at untiy power factor?

a single-phase transformer has a turn ratio of 1:2 and is connected to a purely resistive load.the magnetizing current drawn is 1a.if core losses and leakage reactance are neglected, the primary current is-1.41a2a2.24a3a

A single Phase 50kVA, 2400/240V, 60Hz distribution transformer is used as a step downtransformer at the load end of a 2400V feeder whose series impedance is (1.0 + j2.0) ohms. Theequivalent series impedance of the transformer is (1.0 + j2.5) ohms referred to the high voltage (i.e.primary) side. The transformer is delivering rated total power at 0.8 power factor lagging, and atrated secondary voltage. Neglecting the transformer excitation current, determine:(a) The voltage at the transformer primary terminals,(b) The voltage at the sending end of the feeder,(c) The real and reactive power delivered to the sending end of the feeder.Work in the Per Unit System, using the transformer ratings as base quantities

Iron loss an electrical transformer occurs in

Transformer cores are laminated to reduce ……*1 pointLenz’s currentFaraday’s electromagnetic inductionEddy currentsAmpere’s current