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Which of the following statements about the conservation of charge is correct?
ACharge is conserved only when no nuclear decay occurs
BNet charge can be created out of nothing in any process
CThe total charge of an isolated system is conserved at all times
DCharge is conserved only in the absence of pair-production
Answer & Solution
Correct answer: C. The total charge of an isolated system is conserved at all times
Conservation of charge is universal — for an isolated system the algebraic sum of charges is invariant, even when charged particles are created or destroyed in pairs (e.g., β-decay: a neutron → proton + electron has Δq = 0).
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