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Question
A glass rod rubbed with silk is used to charge 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 ______
Options
the divergence of leaves will not be affected.
the leaves will diverge further.
the leaves will collapse.
the leaves will melt.
Solution
A glass rod rubbed with silk is used to charge 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 the leaves will diverge further.
Explanation:
Because the charge on the glass rod is positive, the charge on the gold leaves will be positive as well. Because X-rays cause more electrons to be emitted from leaves, the leaves become more positive and diverge further.
