A 200 A thyristor is to be operated in parallel with a 300 A thyristor. The ON state voltage drops are 1.5 V and 1.2 Volts. What is the value of resistance R to be connected in series with each thyristor, so that current through the combination is 500 A and each of them is fully loaded ?

• A.  3.0 ohm
• B.  0.3 ohm
• C.  0.03 ohm
• D.   0.3 ohm

Answer: (D)