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13. Nuclei — Physics STD 12 Science — Question

CBSE BoardEnglish MediumSTD 12 SciencePhysics13. Nuclei1 Mark
MCQ
Which ray contain positively charged particle
  • ✓
    $\alpha -$ ray
  • B
    $\beta -$ ray
  • C
    $\gamma -$ ray
  • D
    $X-$ ray
✓

Answer

Correct option: A.
$\alpha -$ ray
a
$\alpha$ - Particles are doubly charged helium nuclei. They are positively charged and gets deflected towards negatively charged plates.

$\Rightarrow He ^{2+}$

$\beta$ - particles are fast moving electrons.

$\Rightarrow e ^{-}$

$\gamma$ - rays are electromagnetic waves.

$\Rightarrow$ Em wave

$X$ - rays are electromagnetic waves.

$\Rightarrow$ Em wave.

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