Assertion: When two protons are brought closer to each other against their electrostatic repulsion then their combined mass becomes slightly more than their total mass. Reason: If we bring two similar charges closer to each other from infinity then work is needed to be done against electrostatic repulsion. Mechanical work against electrostatic repulsion gets stored in the system as electric energy. We know that E=mc^2, hence due to an increase in energy of the system, equivalent mass of the system increases.

Assertion: When two protons are brought closer to each other against t

1.	Assertion: When two protons are brought closer to each other against their electrostatic repulsion then their combined mass becomes slightly more than their total mass. Reason: If we bring two similar charges closer to each other from infinity then work is needed to be done against electrostatic repulsion. Mechanical work against electrostatic repulsion gets stored in the system as electric energy. We know that E=mc^2, hence due to an increase in energy of the system, equivalent mass of the system increases.
Answer» If both ASSERTION and reason are CORRECT and reason is a correct explanation of the assertion . If both assertion and reason are correct but reason is not the correct explanation of assertion If assertion is correct but reason is INCORRECT If both assertion and reason are incorrect. Answer :D

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