Q81 / 120 · VITEEE 2011 · Physics

A glass rod rubbed with silk is used to change a gold leaf electroscope and the leaves are observed to diverge. The electroscope thus charged is exposed to X-rays for a short period. Then

  • A
    the divergence of leave will not affected
  • Correct answer
    B
    the leaves will diverge further
  • C
    the leaves will collapse
  • D
    the leaves will melt

Solution

As charge on glass $\operatorname{rod}$ is $+$ (ve) so charge on gold leaves will also be $+($ ve $)$. Due to X-rays more electrons from leaves will be emitted, so leaves becomes more positive and diverge further.

Hence, the correct answer is option: 'B'.

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