True or false questions

a)Rubbing a polythene rod with a duster gives the rod extra negative charge.

b)Rubbing a polythene rod with a duster takes away positive charge from the duster.

c)The duster will have the same charge as the polythene rod it has rubbed.

d)The duster will have the opposite charge to the polythene rod it has rubbed.

e)The duster will be attracted to the polythene rod.

f)The duster will be repelled by the polythene rod.

g)When an acetate rod is rubbed with a duster it gains charge.

h)When an acetate rod is rubbed with a duster it loses charge to the duster.

To determine the accuracy of the statements, let's consider the concept of charging by friction.

When two objects come into contact and are rubbed together, electrons can be transferred between them, resulting in a build-up of charge. The object that gains electrons becomes negatively charged, while the object that loses electrons becomes positively charged.

Now, let's evaluate each statement:

a) True. Rubbing a polythene rod with a duster causes the rod to gain extra negative charge. When the polythene rod comes into contact with the duster, electrons are transferred from the duster to the rod, leaving the rod with an excess of negative charge.

b) False. Rubbing a polythene rod with a duster does not take away positive charge from the duster. In fact, the duster loses electrons and becomes positively charged.

c) False. The duster will have the opposite charge to the polythene rod it has rubbed. Since the polythene rod gains negative charge, the duster, which loses electrons in the process, will become positively charged.

d) True. The duster will have the opposite charge to the polythene rod it has rubbed. As mentioned earlier, when the polythene rod gains negative charge, the duster loses electrons and gains positive charge.

e) True. The duster, being positively charged after rubbing against the negatively charged polythene rod, will be attracted to the polythene rod. Opposite charges attract each other.

f) False. The duster will not be repelled by the polythene rod. Since the duster becomes positively charged and the polythene rod becomes negatively charged, they will be attracted to each other.

g) True. When an acetate rod is rubbed with a duster, the acetate rod gains charge. The rubbing friction causes a transfer of electrons, leading to a build-up of charge on the acetate rod.

h) False. When an acetate rod is rubbed with a duster, it does not lose charge to the duster. Instead, the rubbing action causes the rod to gain charge by accumulating excess electrons.

In summary:
a) True
b) False
c) False
d) True
e) True
f) False
g) True
h) False