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Thermionic Emission and Radioactivity — Physics STD 10 — Question

ICSE BoardEnglish MediumSTD 10PhysicsThermionic Emission and Radioactivity1 Mark
Question
State charge and mass of $\alpha $-particle.
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Answer

The charge on a-particle is $3.2 \times 10^{-19}$ coulomb and its mass is $6.67 \times 10^{-27} kg$ (i.e., nearly $4$ times the mass of proton).

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