A mobile phone charger is

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| M: +1.33/-0.44

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[UPPSC 2017 P1]

A An inverter

एक इन्वर्टर

B A UPS

एक यूपीएस

C A step-up transformer

एक स्टेप-अप ट्रांसफार्मर

D A step-down transformer

एक स्टेप-डाउन ट्रांसफार्मर