railway DFCCIL Junior Executive 2023 (CBT 1 & CBT 2) Mock Test General Science Physics Work Power Energy

निम्नलिखित विकल्पों में से द्रव्यमान-ऊर्जा तुल्यता का सही सूत्र चुनिए।

1
E = m/c2
2
E = m/c
3
E = mc2
4
E = m2c
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