JEE Main 2017 · 9 Apr · Shift 1 · Physics Q26

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PhysicsSingle correct+4 / -1Question 26 of 90

Imagine that a reactor converts all given mass into energy and that it operates at a power level of $10^9$ watt. The mass of the fuel consumed per hour in the reactor will be : (velocity of light, c is $3\times10^8$ m/s)

0.96 gm

0.8 gm

4\times10^{-2}

6.6\times10^{-5}

Answer and worked solution

Official answer: C

$m=\dfrac{Pt}{c^2}=\dfrac{10^9\times3600}{9\times10^{16}}=4\times10^{-5}$ kg $=4\times10^{-2}$ g.

Topics:Mass defect and binding energy

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JEE Main 2017 · 9 Apr · Shift 1, Physics question 26