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 divergence of leaves will not be affected
The leaves will diverge further
The leaves will collapse
The leaves will melt
When a glass rod is rubbed with a silk cloth, charges appear on both. A similar phenomenon is observed with many other pairs of bodies. Explain how this observation is consistent with the law of conservation of charge.
Why only electron can transfer from one body to another body in frictional electrics ?
Discuss the historical observation of frictional electrics.
Why the metal rods can’t be charged by holding them in hands ?
What are positive and negative charges ? Which type of charge does electron have ?