Manipal MET2020PhysicsElectrostatics
A comb is run through wet hair on a rainy day, then
Options
- Ait will attract large number of small bits of paper
- Bit will not go through the hair
- Cit will not attract small bits of paper
- DNone of the above
Correct answer
C. it will not attract small bits of paper
Step-by-step solution
A dry comb, when passed through hair, gets charged due to friction and because of this it induces an opposite charge on the paper. The electrostatic force of attraction between the comb and the paper is much greater than the weight of paper, therefore, it is lifted. On a wet day, the hair is wet, the friction is quite less and hence, comb does not get charged.