Physics
When a bar magnet is cut into two equal halves, the pole strength of each piece –

Becomes half
Remains the same
Becomes zero
Becomes double

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Physics
In the gamma decay of a nucleus

Both the mass number and the atomic number of the nucleus change
The mass number of the nucleus does not change whereas its atomic number changes
The mass number of the nucleus changes whereas its atomic number does not change
Neither the mass number nor the atomic number of the nucleus changes

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