Particles and their anti-particles have

Same masses but opposite spins

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Same masses but opposite magnetic moments.

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Same masses and same magnetic moments

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Opposite spins and same magnetic moments

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Solution

The correct option is B Same masses but opposite magnetic moments.
According to the definition of anti-particles, particles and their anti-particles have the same mass but opposite magnetic moments.

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Particles and their anti-particles have

The correct option is B Same masses but opposite magnetic moments.According to the definition of anti-particles, particles and their anti-particles have the same mass but opposite magnetic moments.

The correct option is B Same masses but opposite magnetic moments.
According to the definition of anti-particles, particles and their anti-particles have the same mass but opposite magnetic moments.