Page 36 - Electrician - TT (Volume 1)
P. 36

ELECTRICIAN - CITS




                                              MODULE 2 : Basic Electrical Circuits


           LESSON 5-12 :  Ohm’s  law,  series  &  parallel,  kirchhoff’s
           law, wheatstone bridge, condutors insulators wire joints

           soldering


            Objectives

           At the end of this lesson you shall be able to:
           •  define electricity and atom
           •  define the fundamental terms, wheatstone bridge
           •  state ohm’s law, kirchhoff’s law and apply in on electrical circuit
           •  state conductor insulators different types of wire joints & their uses
           •  state the necessity of soldering and types of soldering.


           Fundamentals (Fig 1)

           Matter
           Matter is anything that has mass and occupies space.
           Eg: Solid, liquid and gases
           Molecules
           Smallest particles of a substances that has all the property of substances

           Atom
           The simplest particles of a molecule. The atoms are the building block of the matter.
           ATomic structure
           An atom consists of a central nucleus of positive charge around which small negatively charged particle, called
           electrons revolve in different path or orbits.
           Nucleus
           It is the central part of an atom. It contains proton and neutron
           Proton

           It has positive electric charge. It is almost 1840 times heavier than the electron. Do not take active part in the flow
           or transfer electricity.


               Fig 1






















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