STANDARDPhysics-Modern Physics
STANDARD Physics Mass-Energy Equivalence MCQ Question
Type: MCQ-conceptual-Medium
One milligram of matter is converted into energy. The energy released will be
A
9 × 10⁶ J
B
9 × 10⁸ J
C
9 × 10¹⁰ J
D
9 × 10¹² J
Correct Answer
Option C
Detailed Explanation
Here, m = 1 mg = 1 × 10⁻³ g = 1 × 10⁻⁶ kg. According to Einstein's mass-energy equivalence E = mc², where c is the speed of light in vacuum. Therefore, E = (1 × 10⁻⁶ kg)(3 × 10⁸ m/s)² = 9 × 10¹⁰ J.
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