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The power obtained in a reactor using U235 disintegration is 1000 kW. The mass decay of U235 per hour is
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- 10 micro gram
- 20 micro gram
- 40 micro gram
- 1 micro gram
Correct Option: C
E = mc2
| m = | c2 |
So, mass decay per second
| = | = | (Power in watt) | ||||||
| dt | c2 | dt | c2 |
| = | × 1000 × 103 | (3 × 108)2 |
and mass decay per hour
| = | × 60 × 60 | dt |
| = | × 106 × 3600 | (3 × 108)2 |
= 4 × 10–8 kg = 40 micro gram
