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NEET 2020
Exam
NEET
Year
2020
Subject
Physics
Chapter
Nuclear Physics

NEET 2020 · Physics · Nuclear Physics

The energy equivalent of 0.5g of a substance is:

The energy equivalent of 0.5g0.5g of a substance is:

Options

  1. A4.5×1013J4.5 \times {10}^{13}J
  2. B1.5×1013J1.5 \times {10}^{13}J
  3. C0.5×1013J0.5 \times {10}^{13}J
  4. D4.5×1016J4.5 \times {10}^{16}J

Correct answer

A. 4.5×1013J4.5 \times {10}^{13}J

Step-by-step solution

Einstein's theory of special relativity gives the relation between mass and energy.

Energy, E=mc2E = m{c}^{2}, where cc is the speed of light.

E=0.5×10−3×9×1016E = 0 . 5 \times {10}^{- 3} \times 9 \times {10}^{16}

⇒E=4.5×1013J⇒ E = 4 . 5 \times {10}^{13}J

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