railway RRB JE (CBT I + CBT II) Mock Test 2024 Electrician and Wireman Cells and Batteries

ଏକ ବ୍ୟାଟେରୀ ଚାର୍ଜର୍ ଏକ __________ ପରି କାର୍ଯ୍ୟ କରେ । 

1
ରୂପାନ୍ତରକାରୀ
2
ରେକ୍ଟିଫାୟର୍
3
ସାଇକ୍ଲୋକନଭର୍ଟର
4
ହେଲିକପ୍ଟର
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