Home
Class 12
PHYSICS
A comb run through one's dry hair attrac...

A comb run through one's dry hair attracts small bits of paper. Why?

Text Solution

Verified by Experts

Comb gets charged when it runs through dry hair. When it is brought near small bits of paper, due to induction nearer part of paper to comb gets oppositely charged and hence gets attracted towards it.
Promotional Banner

Topper's Solved these Questions

  • ELECTRIC CHARGES AND ELECTROSTATIC FORCE

    BETTER CHOICE PUBLICATION|Exercise LONG ANSWER TYPE QUESTIONS |3 Videos
  • ELECTRIC CHARGES AND ELECTROSTATIC FORCE

    BETTER CHOICE PUBLICATION|Exercise NUMERICAL PROBLEMS|13 Videos
  • ELECTRIC CHARGES AND ELECTROSTATIC FORCE

    BETTER CHOICE PUBLICATION|Exercise SHORT ANSWERTYPE QUESTIONS |4 Videos
  • DIPERSION OF LIGHT

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS|5 Videos
  • ELECTRIC CURRENT, RESISTANCE AND E.M.F.

    BETTER CHOICE PUBLICATION|Exercise MOST EXPECTED QUESTIONS |14 Videos

Similar Questions

Explore conceptually related problems

A comb run through one's dry hair attracts small bits of paper. This is due

A comb after passing through dry hair attracts small pieces of paper. What happens if the hair is wet or if it is a rainy day?

Why does a plastic comb rubber in hair attract small bits of paper?

why does a charged glass rod attract a piece of paper?

What happens when a plastic scale rubbed with dry hair is brought near pieces of paper?

The students in a class are seated according to the marks in the previous examination. Once it so happens that four of these students get equal marks and therefore the same rank. To decide their seating arrangement, the teacher wants to write down all possible arrangements, one in each of separate bits of paper, in order to choose one of these by lots. How many bits of paper are required ?

Although direction of current through the armature reverses after each half cycle, yet it keeps on rotating in one direction. Why?

Read the following passage and answer the questions. Ultrafiltration is the process of separating the colloidal particles from the solvent and soluble solutes present in the colloidal solution by specially prepared filters, which are permeable to all substances except the colloidal particles. Colloidal particles can pass through ordinary filter paper because the pores are too large. However, the pores of filter paper can be reduced in size by impregnating with collodion solution to stop the flow of colloidal particles. The usual collodion is a 4% solution of nitrocellulose in a mixture of alcohol and ether. An ultra-filter paper may be prepared by soaking the filter paper in a collodion solution, hardening by formaldehyde and then finally drying it. Thus, by using ultra-filter paper, the colloidal particles are separated from rest of the materials. Ultrafiltration is a slow process. To speed up the process, pressure or suction is applied. The colloidal particles left on the ultra-filter paper are then stirred with fresh dispersion medium (solvent) to get a pure colloidal solution. How can you convert an ordinary filter paper into an ultrafilter paper ?