Which of the following has the highest specif | vedclass

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(A) Specific charge is defined as the ratio of charge to mass $(q/m)$.For a positron, the charge is $+e$ and the mass is $m_e$ (mass of an electron).S

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Positron

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(A) Specific charge is defined as the ratio of charge to mass $(q/m)$.For a positron, the charge is $+e$ and the mass is $m_e$ (mass of an electron).Specific charge of positron = $e/m_e$.For a proton, the charge is $+e$ and the mass is $m_p \approx 1836 m_e$.Specific charge of proton = $e/m_p = e/(1836 m_e)$.For an $He$ nucleus (alpha particle), the charge is $+2e$ and the mass is $m_{\alpha} \approx 4 m_p \approx 7344 m_e$.Specific charge of $He$ nucleus = $2e/(7344 m_e) = e/(3672 m_e)$.Comparing the values, the positron has the smallest mass, therefore it has the highest specific charge.

Which of the following has the highest specific charge?

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