Question

Mention two sources of energy loss in a transformer

Answer 1

$\huge \mathcal{TRANSFORMER}$

◼Transformer is a device used to change the magnitute of the e.m.f induced.

$\bold{PRINCIPLE}$

◼It works on the principle of electromagnetic induction.Whenever there is change in magnetic feild due to varying current in secondary and primaty coil an induced varying current of same freqeucy but of different magnitude flows in the secondary coil.

$\bold{CONSTRUCTION}$

◼It has two coils :-

▶Primary coil

▶Secondary coil

◼If the current is to be increased the number of turns of primary coil will be less than secondary coil.

◼If the currentvis to decreased the number of turns of secondary will be less than of primary.

◼Its made up of rectangular soft iron core of T and U shaped placed on each other.

◼On one arm of core primary coil is wound.

◼On other arm secondary oil is wound.

$\bold{Source \: of \: loss \: of \: energy}$

⚫The laminated core can be the reason for the loss of energy, because if it wasnt laminated it would have get all magnetic feild lines a open path but its avoided becaused its laminated.

⚫If the core would have been made from metal iron ,there would have been much loss of energy,but its avoided because it is made up of soft iron.

⚫If the wire in coil was made up of thin wire there will be loss of energy ,and thid loss of heat is called copper loss.Its avoided by making wires thicker.

Answer 2

two sources of energy loss are:

a) copper loss

b) core or iron loss

Copper loss is the term often given to heat produced by electrical currents in the conductors of transformer windings, or other electrical devices. Copper losses are an undesirable transfer of energy, as are core losses, which result from induced currents in adjacent components.

Iron losses are caused by the alternating flux in the core of the transformer as this loss occurs in the core it is also known as Core loss. Iron loss is further divided into hysteresis and eddy current loss.