When $_{92} U^{235}$ undergoes fission. 0.1% of its original mass is changed into energy. $9 \times 10^{x} J$ of energy is released if $1 k g$ of $_{92} U^{235}$ undergoes fission. Value of $x$ = ___

Q. How many nuclei of

_{92} U^{235}

should undergo fission, per second, to produce a power of

10 M W

, if

200 M e V

of energy is released per fission of

_{92} U^{235}

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A reactor is developing energy at the rate of 32 Megawatt. The no. of U235 atoms that undergo fission in 1s is [1 fission of U235 atom releases 200MeV]

The correct option is D 1018 Power=Energy/sec =32×106J/sNo. of atoms =32×106200×1.6×10−13=1018

A reactor is developing energy at the rate of $32$ Megawatt. The no. of $U$ $^{235}$ atoms that undergo fission in $1 s$ is [ $1$ fission of $U$ $^{235}$ atom releases $200 M e V$ ]

The correct option is D $10$ $^{18}$
$P o w e r = E n e r g y / s e c$ $= 32 \times 10^{6} J / s$

No. of atoms $= \frac{32 \times 10^{6}}{200 \times 1.6 \times 10^{- 13}}$ $= 10^{18}$