Answer:
Here is complete answer
Step-by-step explanation:
a) The net charge on the cloth would depend on the type of charge that was transferred from the Perspex rod to the cloth. If the Perspex rod has a positive charge and the cloth is neutral, then the cloth would acquire a negative charge after being rubbed against the rod. If the Perspex rod has a negative charge and the cloth is neutral, then the cloth would acquire a positive charge after being rubbed against the rod. If the Perspex rod and the cloth both have the same type of charge (either both positive or both negative), then the net charge on the cloth would not change.
b) The net charge on the Perspex rod would depend on the type of charge that was transferred to the cloth. If the Perspex rod has a positive charge and the cloth is neutral, then the Perspex rod would lose some of its positive charge after being rubbed against the cloth. If the Perspex rod has a negative charge and the cloth is neutral, then the Perspex rod would lose some of its negative charge after being rubbed against the cloth. If the Perspex rod and the cloth both have the same type of charge (either both positive or both negative), then the net charge on the Perspex rod would not change.
c) If the Perspex rod has a positive charge and the polythene rod has a positive charge, then the two rods would repel each other because like charges repel. If the Perspex rod has a positive charge and the polythene rod has a negative charge, then the two rods would attract each other because unlike charges attract. If the Perspex rod has a negative charge and the polythene rod has a positive charge, then the two rods would attract each other because unlike charges attract. If the Perspex rod has a negative charge and the polythene rod has a negative charge, then the two rods would repel each other because like charges repel.