Question

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
• B. the leaves will diverge further
• C. the leaves will collapse
• D. the leaves will melt

Answer 1

Answer: (B)

As charge on glass 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.