Question

What is the frictional order of the following materials on rubbing:

ebonite, glass rod, wool, plastic

• A. Wool, glass rod, ebonite, plastic
• B. Glass rod, wool, plastic, ebonite
• C. Wool, glass rod, plastic, ebonite
• D. Glass rod, wool, ebonite, plastic

Answer 1

The correct option is D Glass rod, wool, ebonite, plastic

When any of these materials are rubbed together, the one in higher order gets positive charge (+) and the one in the lower order gets negative charge (-). The correct frictional order is: glass, wool, ebonite and plastic.