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Identify the statement that is incorrect.

1. The total charge of an isolated system remains constant.
2. Charged particles cannot be created or annihilated.
3. Charged particles can be created or annihilated.
4. Net charge cannot be created or destroyed.

Correct answer: Charged particles cannot be created or annihilated.

Solution

The incorrect statement is 'Charged particles cannot be created or annihilated' - they can be (e.g., pair production/annihilation) provided net charge is conserved. The other three statements are all true.

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