When a comb is run through dry hair, it gets charged through the process of friction. This occurs because electrons are transferred between the comb and the hair, leading to static electricity. The resulting charged comb can attract small bits of light objects like paper due to electrostatic forces.
However, in this scenario, the hair is wet and it is a rainy day. Let's analyze the implications:
- Water is a conductor of electricity. When the hair is wet, any static charge the comb might acquire through friction rapidly dissipates through the water. Consequently, the comb doesn't retain enough charge to attract paper.
- Additionally, the atmospheric conditions during rainy days (higher humidity) also contribute to the dissipation of charges. Humid air enhances the conductivity, allowing charges to flow away from the comb more easily.
- Therefore, due to the hair being wet, the absence of built-up static electricity results in the comb not being able to attract small bits of paper.
Given these reasons, we conclude that the comb will not attract small bits of paper when run through wet hair on a rainy day.