Series/Parallel Circuit Analysis

TASK1
Consider the series/parallel circuit as shown in figure 1.
Determine the voltage across 5-ohm resistance by using ohm law.
Now we applying KCL to node V, we get.
Determine the current through 5ohm resistance.
TASK2
a)
CONSTRUCTIONAL FEATURES OF TRANSFORMER:
The active part of the transformer:
1) Transformer core
2) transformer winding

Transformer core: the most of electrical machines, the magnetic circuit is made up of silicon
steel.
Transformer winding:
Transformer winding is made of either by Aluminium or copper.
Winding is not made up of single solid conductor because of stray current in a solid conductor
due to this stray current stray loss will be produced.
So we replace solid conductor with the stranded conductor.
Stay current cannot pass from one stand to another stranded conductor.
Advantage of stranded conductor:
1) To reduced stray load loss in the conductor due to stray current.
2) To reduced skin effect of the winding.
Lamination:
Insulation material lamination is required for electrical isolation.
Eddy current passes from one lamination to another if no insulation is provided.
Insulating material:
1) Oxide paint
2) China clay
3) Japan varnish
4) Thin impregnated paper
LENZ’S LAW:
The direction of statically induced EMF is such that the current due to this EMF will flow
through a conductor in such a direction which in turn produces some flux according to
electromagnet theory and this flux must oppose the change in main field flux which is cause for
the production of EMF as well as current.
FARADAY’S LAW
The main aim of Faraday's law is to generate EMF in the conductor.
Whenever there is relative space (or) time variation between the magnetic field and conductor
the EMF will induce in the conductor this faraday’s law.

In the time-varying magnetic field, the conductor is not stationary or at rest. Hence this EMF is
statically induced EMF.
APPLICATION:
The transformer used in every apartment load centre to recover voltage drop.
The building service industry has used a distribution transformer to load point.
b)
OBSERVATION OF EMF EQUATION:
In the transformer, EMF per turns on both sides is the same.
EMF/turn =
Comparing primary MMF = secondary MMF
Therefore derive the current turn’s ratio.
C)
The following data has given below.