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Attractive and repulsive forces are essential concepts in the study of electric charges. When objects become charged, they exhibit these forces depending on the nature of their charges.
An attractive force occurs when two objects with opposite charges come close to each other. For instance, a positively charged object will attract a negatively charged object. This attraction occurs because opposite charges exert force towards each other.
On the other hand, repulsive forces occur when two similarly charged objects interact. For example, two positively charged objects will push away from one another just as two negatively charged objects would. This happens because like charges exert force away from each other.
In the context of determining electrification, repulsion is a more reliable indicator because if two objects repel each other, they must be similarly charged, confirming the presence of charge.

Understanding electric charge is fundamental in physics. Electric charge is a property of matter that causes it to experience a force when placed in an electromagnetic field. There are two types of charges: positive and negative.
Electric charge is measured in coulombs (C) and is carried by particles, such as electrons, which have a negative charge, and protons, which have a positive charge. An object becomes charged through the imbalanced presence of these charged particles.
Here are a few key points about electric charge:

• Like charges repel each other.
• Opposite charges attract each other.
• Charge can be transferred from one object to another.

When an object has an equal number of protons and electrons, it is neutral. But when this balance is disturbed, the object becomes an electrically charged, giving rise to attraction or repulsion forces.

There are several methods through which objects can become charged. Each method involves the transfer or induction of electric charge.
Here are the three primary methods of charging:

• Friction: This involves rubbing two different materials together, leading to the transfer of electrons from one material to the other. For example, rubbing a balloon against your hair can cause the balloon to become negatively charged.
• Conduction: Charging by conduction occurs when a charged object comes into contact with a neutral object. The charge is transferred, resulting in both objects sharing the overall charge.
• Induction: This method involves bringing a charged object close to a neutral object without touching it. The presence of the charged object causes a redistribution of charges within the neutral object, effectively charging it by inducing a charge separation.

Each of these methods plays a significant role in how we understand and demonstrate electrification in practice, allowing us to manipulate and observe electrical phenomena.