Page 3 - Final Science_B.B_prep.1_t.1_unit2 2026_Neat

Lesson one Electric Forces

All materials have electrically neutral atoms As the number of

positive protons equal the number of negative electrons.

Activity:

Rub one end of the rod with a piece of wool then
bring rod close to light weight paper or small
foam pieces. (using ebonite & copper rods)

P.O.C Ebonite rod Copper rod

Observation: Paper scraps are Paper scraps are not
attracted to the rod end. attracted to the rod end.
Conclusion:
After rubbing, the rod is Friction doesn’t give
charged with static some objects like copper
electricity (electrostatic) the ability to attract
charges settled on the scraps of paper.
rubbed part of the object
only and don't transfer to
the rest of it.

First Term 102