allery1957 সালে ভারতীয় রেলওয়ে কোন ট্র্যাকশন সিস্টেম গ্রহণ করেছিল?
A1.5 kV DC
B3 kV DC
C11 kV AC
D25 kV AC
Answer & Solution
Correct answer: D. 25 kV AC
ভারতীয় রেলওয়ে 1957 সালে 25 kV AC ট্র্যাকশন বেছে নিয়েছিল, যার বাণিজ্যিক পরিষেবা 1960 সালে শুরু হয়।
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