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The section discusses how various materials can be charged through the process of friction. It focuses on observing the effects of charging on different objects, introduces the concept of static electricity, and explains the interactions between charged objects.
In this section, we delve deeper into the concept of charging by rubbing. The main focus is on carrying out different activities with household objects, such as plastic refills and combs, to observe how they acquire static electric charge when rubbed with different materials like polythene and hair. We explore how charges interact, noting that objects charged with the same type of charge repel each other, while unlike charges attract.
The section also introduces the concept of electric charge in terms of positive and negative types and the phenomenon of static electricity, i.e., charges that remain stationary until discharged or moved. The section concludes with implications for understanding real-life phenomena such as lightning.
Charging by Rubbing: The process of generating static electricity through friction.
Static Electricity: Charges that remain stationary until moved or discharged.
Positive and Negative Charges: Like charges repel while unlike charges attract.
Rub the comb with care, attract some hair, charge it right, watch the fright!
Once, a comb was feeling lonely, so it rubbed against a sweater and became the life of the party, attracting all the paper bits!
PEN – Positive Electrons Negative: Remember, positive charges attract negative charges.
Rubbing a plastic balloon on wool creates a static charge that allows the balloon to pick up small paper pieces.
When a glass rod is rubbed with silk, it becomes positively charged while the silk gains a negative charge.
Term: Charging by Rubbing
Definition: The process of generating static electricity on an object by friction with another material.
The process of generating static electricity on an object by friction with another material.
Term: Static Charge
Definition: Electric charge that remains on an object until it is discharged.
Electric charge that remains on an object until it is discharged.
Term: Like Charges
Definition: Two objects that have the same type of charge, which repel each other.
Two objects that have the same type of charge, which repel each other.
Term: Unlike Charges
Definition: Two objects that have different types of charge, which attract each other.
Two objects that have different types of charge, which attract each other.
Term: Electricity
Definition: The flow of electric charge, often produced by movement of electrons.
The flow of electric charge, often produced by movement of electrons.