Page 34 - CITS - Welder - Trade Theory
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WELDER - CITS

























           3  Voltage and Current
              •   Voltage (V) is the measure of electrical potential difference between two points in a circuit. It represents the
                 force that pushes electric charges through a conductor.
              •   Current (I) is the flow of electric charge. It is measured in amperes (A) and determines the rate at which
                 electric charge passes through a conductor.

              •   In arc welding, adjusting voltage and current settings is essential to control the heat input and penetration
                 into the work piece.
           4  Resistance
              •   Resistance (R) is the opposition to the flow of electric current in a circuit. It is measured in ohms (Ω).

              •   The resistance in the welding circuit plays a significant role in generating heat. The high resistance at the
                 point where the electrode contacts the work piece leads to intense heat generation, forming the arc.
           5  Electric Arc

              •  An electric arc is a discharge of electricity between two electrodes through ionized gas or plasma.
              •  In arc welding, the arc forms between the welding electrode and the work piece, creating temperatures high
                 enough to melt the base metal and any filler material, resulting in a strong weld joint.







































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                                           CITS : C G & M - Welder - Lesson 6&7
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