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The quantisation of electric charge, q = ne, applies to electric charge only, even though charge cannot exist without mass.

One simple rule to think here is that electric charge is a scalar quantity with magnitude. It has positive and negative signs, depending on the direction it is forced to move in an electric field. Mass is always positive. So when you add mass, it never cancels out or becomes zero. Also do consider that a charge can never exist when there is no mass. In calculations, you must remember not to take in the mass but just the charge itself. 

CUCAT 2026 admit card is likely to be published approximately one week before the actual exam date. Calicut University will publish the admit cards on its official website. 

No, there may be some charges inside the system. The overall charge is zero because the total positive charge will cancel out the total negative charge inside. This directly follows the principle of additivity of charge, where the positive and negative charges are the algebraic sum of each other. 

CUCAT 2026 admit card will be published by the Calicut University. Candidates can download their admit card on the official website of the CU once it is released. 

Jamia Hamdard University (Delhi), Manipal College of Pharmaceutical Sciences (Manipal)

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