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
A. The divergence of leaves will not be affected
B. The leaves will diverge further
C. The leaves will collapse
D. The leaves will melt

Answer 1

Correct Answer - b
Charge on glass rod is positive, so charge on gold leaves will also be positive. Due to `X`-rays, more electrons from leaves will be emitted, so leaves becomes more positive and diverge futher.