MCQ
The magnetism of magnet is due to:
  • A
    Pressure of big magnet inside the earth.
  • B
    Earth.
  • C
    Cosmic rays.
  • The spin motion of electron.

Answer

Correct option: D.
The spin motion of electron.

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Match List $I$ of the nuclear processes with List $II$ containing parent nucleus and one of the end products of each process and then select the correct answer using the codes given below the lists :

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$S.$ $\quad$Proton emission $4.$ $\quad{ }_{94}^{239} Pu \rightarrow{ }_{57}^{140} La +\ldots \ldots$.

Codes: $ \quad \quad P \quad Q \quad R \quad S $ 

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