railway Gujarat Metro SCTO Mock Test 2023 Electronic Devices

ইলেকট্রন ______ চার্জযুক্ত

1
ধনাত্মকভাবে 
2
ঋণাত্মকভাবে  
3
নিরপেক্ষভাবে 
4
দ্বৈতভাবে 
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