During the nuclear fusion reaction,

  • A
    $A$ heavy nucleus breaks into two fragments by itself.
  • B
    $A$ light nucleus bombarded by thermal neutrons breaks up.
  • C
    $A$ heavy nucleus bombarded by thermal neutrons breaks up.
  • D
    Two light nuclei combine to give a heavier nucleus and possibly other products.

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When four hydrogen nuclei combine to form a helium nucleus, then:

An atomic power nuclear reactor can deliver $300 \, MW$. The energy released due to fission of each nucleus of uranium atom $U^{238}$ is $170 \, MeV$. The number of uranium atoms fissioned per hour will be (approximately):

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The energy released per fission of uranium-$235$ is about $200 \, MeV$. $A$ reactor using $U-235$ as fuel is producing $1000 \, kW$ power. The number of $U-235$ nuclei undergoing fission per second is approximately:

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Match the following items in Column-$A$ with their corresponding principles in Column-$B$:
Column-$A$Column-$B$
$A$. Rocket propulsion$P$. Bernoulli's principle in fluid dynamics
$B$. Aeroplane$Q$. Total internal reflection of light
$C$. Optical fibres$R$. Newton's laws of motion
$D$. Fusion test reactor$S$. Magnetic confinement of plasma
$T$. Photoelectric effect

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