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Doctors Medicines MCQs Q&A

  1. Continuously variable reactor
  2. Saturable reactor
  3. Moving shunt reactor
  4. Moving coil reactor
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1 Answers

Option 1 : Continuously variable reactor

Welding Transformer:

  • These transformers are used to change the alternating current from the power line into a low-voltage, high ampere current in the secondary winding.
  • It has a magnetic core with primary winding which is thin and has a large number of turns.
  • A secondary winding with less number of turns and a high cross-sectional area.
  • The impedance of the welding transformer must be higher than the normal transformer to control arc and also to control current.
  • The use of a continuously variable reactor controls the arc as this reactor has a greater reactance obtained due to greater core insertion and hence the output current is less.​

We can also use different reactors for controlling the arc. They are:

  1. Tapped reactor
  2. Moving coil reactor
  3. Magnetic shunt reactor
  4. Saturable Reactor
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