railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test Electronic Mechanic Power Supply Uninterruptible Power Supply

କେଉଁ ଉପାଦାନ ଏକ ଅନଲାଇନ୍ UPS କୁ  ଅଫଲାଇନ୍ UPS ଠାରୁ ଭିନ୍ନ କରିଥାଏ?

1
ଚାର୍ଜ ନିୟନ୍ତ୍ରକ 
2
ବେଟେରୀ
3
ଷ୍ଟାଟିକ୍ ସୁଇଚ୍
4
AC/DC ପ୍ରତିଶୋଧକ
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