engineering recuitment RVUNL JEn (RSEB) Mock Tests 2025 Utilization of Electrical Energy Heating

परावैद्युत तापन के लिए आवश्यक आवृत्ति रेंज ______ है।

1
50 Hz to 500 Hz
2
10 kHz to 200 kHz
3
500 Hz to 10 kHz
4
1 MHz to 50 MHz
5
1 kHz to 50 kHz
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