railway RRB JE (CBT I + CBT II) Mock Test 2024 Heat Transfer Radiation

स्टीफ़न-बोल्ट्ज़मैन नियम को किस प्रकार व्यक्त किया जाता है?

1
Q = σAT4
2
Q = σA2T4
3
Q = σAT2
4
Q = AT4
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