Charge a pocket by rubbing it with it silk can you determine if positively charg
ID: 1597916 • Letter: C
Question
Explanation / Answer
Answer:-
a) if you charge a pocket comb by rubbing it with a silk scarf, how can you determine if the comb is positively or negatively charged?
in this case have charge a Comb by rubbing with silk scarf it means we know that some amount of charge is exist in comb. so we will use a one object which charge and known it is positive or negative.
if known positive charge object attracts a charge comb then we can say that there is negative charge in a Comb.
if known positive charge repel the charge comb then we can say that there is positive charge in a comb.
b)Why does a shirt or blouse taken from clothes dryer sometimes cling to your body?
In this case the shirt or blouse rotated in a dryer it leads to friction in between dryer and cloth and due to friction some amount of static charge exist in the cloth. it polarise the cloths and attracted to our bodies electrostatically.
c) Why does a plastic ruler that has been rubbed with a cloth have the ability to pick up small pieces of paper? Why is this difficult on a humid day?
in this case when a ruler rubbed on a cloth a free electrons transfer from a cloth to ruler. while rubbing a ruler cloth loses a electrons it becomes, and ruler gains electron so it becomes negative. negative charge of ruler attracts the the positive charges and repel the electrons.due to this process electric force is exerted and pick up the pieces of paper. due to humidity the electric force is get affected and it is difficult on humid day.
d) If positively charged rod brought close to neutral piecec of paper which it attracts, & why?
in this case we can say that the positively charged rod having more numbers of protons campare to electorns.
and neutral piece of paper having a equal number of protons and electrons. when we brought positively charged rod closer to neutral piece of paer the protons get repel and electron attracts the rod. this process is called a induction. due to this induction positively charged paper attracts the neutral piece of paper.