engineering recuitment NVS Electrician Cum Plumber 2022 Mock Test Electrician and Wireman Electrical Networks Alternating Current

भारत में घरेलू उद्देश्यों के लिए प्रयुक्त AC आपूर्ति की आवृत्ति _____ होती है।

1
25 Hz
2
50 Hz
3
60 Hz
4
100 Hz
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