Example based on conservation of charge :
Glass rod rubbed with silk: When a glass rod is rubbed with silk ,glass rod attains positive charge and silk acquires equal negative charge .Although positive and negative charge have been developed , the net charge on the system is zero , i.e., the same as was before rubbing .
NOTE: Rubbing does not create charge but only transfers heat it from one body to another. The charge that is gained by one body is lost by the other .Hence electric charge is conserved.
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When a neutral object gains electrons, it becomes negatively charged, as the total charge of the system remains constant. If a positively charged object loses electrons, it becomes positively charged to maintain the conservation of charge. This principle is essential for understanding how charge is transferred in various objects and systems while ensuring that total charge remains constant.
Kirchhoff's junction rule is related to the conservation of energy because it states that the total current entering a junction in an electrical circuit must equal the total current leaving the junction. This principle is based on the law of conservation of charge, which is a fundamental principle in physics that states that charge cannot be created or destroyed, only transferred. Therefore, the application of Kirchhoff's junction rule ensures that the flow of current in a circuit is consistent with the conservation of charge and energy.
The law of conservation of charge states that the total electric charge in an isolated system remains constant over time. This means that no new charge can be created or destroyed, only transferred from one object to another. For example, in a closed system where positive charge is transferred from one object to another, the total positive charge in the system remains the same before and after the transfer.
When a negatively charged object transfers excess electrons to a neutral object, the total charge before and after remains the same. During a chemical reaction, the total charge of the reactants is equal to the total charge of the products. In an electric circuit, the total current entering a junction is equal to the total current leaving the junction, demonstrating conservation of charge. When a positively charged object is brought near a neutral object, charge is redistributed but the total charge remains constant. The process of charging by friction demonstrates conservation of charge, as charge is transferred between objects without being created or destroyed. The discharge of a capacitor involves conservation of charge as the total charge on the capacitor remains the same before and after discharge. Conservation of charge is observed in electrostatic precipitation systems, where particles acquire charge but the total charge in the system is conserved. In nuclear reactions, the sum of the charges of the particles before the reaction is equal to the sum of the charges of the particles after the reaction. When a conductor is grounded, excess charge is transferred to or from the ground, ensuring conservation of charge in the system. The concept of conservation of charge underlies the working of devices like photocopiers and inkjet printers, where charge is manipulated for image formation without violating the conservation law.
the principle of conservation of charge. Charge is neither created nor destroyed, it is only transferred between objects. Therefore, the total charge before and after charging must remain the same.
The conservation of charge states that the total electric charge in a closed system remains constant over time. This means that charge cannot be created or destroyed, only transferred from one object to another. It is a fundamental principle in physics that helps explain various electrical phenomena.