Page 36 - Electrician - TT (Volume 1)

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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