In arc welding, the electric arc is produced between the work and the electrode by
A. Voltage
B. Flow of current
C. Contact resistance
D. All of these
Answer: Option D
Solution (By Examveda Team)
Arc welding is a fusion welding process where heat is generated to melt and join metals.The electric arc is created between the electrode and the workpiece, which produces intense heat.
Voltage is responsible for initiating and maintaining the arc gap between the electrode and the workpiece.
Flow of current provides the energy required to sustain the arc and generate heat for melting the metal.
Contact resistance at the point of initial contact helps in momentarily generating heat, which assists in the arc initiation.
Therefore, all these factors — voltage, current flow, and contact resistance — contribute to producing the electric arc in arc welding.
Hence, the correct answer is Option D: All of these.
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Voltage → arc ko start karne ke liye required hai (open circuit voltage 50–100 V hota hai).
Flow of current → arc ko sustain karta hai aur heat generate karta hai.
Contact resistance → jab electrode touch karke thoda sa lift karte hain to waha resistance ke wajah se heat banti hai, jo arc ko initiate karti hai.
👉 Matlab ye teeno factors arc ke ban’nay mein role play karte hain.
Correct Answer: D. All of these
D is correct Ans
Pls explain contact resistance
It should be d
Why
You MF don't post any wrong answers in site.... bitch