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

कोणत्या घटकामुळे ऑनलाइन UPS हा ऑफलाइन UPS पेक्षा भिन्न आहे?

1
चार्ज कंट्रोलर
2
बॅटरी
3
स्टॅटिक स्विच
4
AC/DC रेक्टिफायर 
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