Mechanical Engineering - Workshop Technology - Discussion
Discussion Forum : Workshop Technology - Section 1 (Q.No. 6)
6.
In arc welding, the electric arc is produced between the work and the electrode by
Discussion:
19 comments Page 2 of 2.
Jaydeep Jadeja said:
8 years ago
In Instructor, exam right answer is given as flow of current.
SHIJIL PK said:
8 years ago
The correct answer should be due to the flow of current.
Chetan said:
8 years ago
So, what is the actual answer of this question?
Vikas said:
9 years ago
The correct answer should be due to the flow of current.
Eldose Mathew said:
9 years ago
Since air is a mixture of different gases and having very low electrical conductivity, air resist the flow of current through it. Due to this high resistant offered by the air when current is passing through its high heat will generate. (H- I2Rt). Moreover, in welding, the current is very high and voltage is low. From the above equation, it is clear that heat produced is the square of the current X resistance.
Dhruv said:
10 years ago
Why potential difference produce between electrode and base metals?
Kiran said:
1 decade ago
Potential difference between electrode and base metal produce electric arc because flow of charge takes place from high potential to low potential.
Murugan said:
1 decade ago
Filler rod is melting to the volt. Because the volt is high the base metal was cut off, but low volt metal not weld.
Subrahmanyam said:
1 decade ago
Whenever a current carrying conductor is make contact with w/p and then keep distance b/w them then a spark will be produced because of current flowing through a highly resistant ionised air column.
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