First slide

Electric charges and its properties

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

Easy

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

Solution

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 further.

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