activity 4.1 ncert class 9 science solution
Answers
Explanation:
What will you observe in the polythene bag after a few hours of setting up the activity
Procedure :
Activity 4.1 (a) asks us to comb dry hair and then to check whether it attracts small pieces of paper or not..
where as activity 4.2 asks us to rob a glass rod with silk cloth and to bring near an inflated balloon and then to observe what happens...
Observation :
a) The paper is initially attracted to the comb.
b) When we rub glass rod with silk cloth and bring it near an inflated balloon then glass rod will acquire positive charge.
Explanation :
a) Thecomb causes separation of charge in the paper. The part of the paper pieces with positive charge is attracted to the comb.
b) The transfer of electrons takes place from glass rod to silk cloth thereby leaving glass rod positively charged.
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