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JIPMER 2019
Exam
JIPMER
Year
2019
Subject
Physics
Chapter
Nuclear Physics

JIPMER 2019 · Physics · Nuclear Physics

Ratio of charge on positron to mass of positron is approximately

Ratio of charge on positron to mass of positron is approximately

Options

  1. A+2×1011+2 \times 10^{11}
  2. B+5×1012+5 \times 10^{12}
  3. C−2×1011-2 \times 10^{11}
  4. D−5×1011-5 \times 10^{11}

Correct answer

A. +2×1011+2 \times 10^{11}

Step-by-step solution

 Charge on positron (q)=e=1.6×10−19C Mass of positron (m)= mass of electron =9.1×10−31kg∴qm=1.6×10−199.1×10−31=1.75×1011≃2×1011C/kg\begin{aligned} & \text{ Charge on positron }(\mathrm{q})=\mathrm{e}=1.6 \times 10^{-19} \mathrm{C} \\ & \text{ Mass of positron }(\mathrm{m})=\text{ mass of electron } \\ & =9.1 \times 10^{-31} \mathrm{ kg} \\ & \therefore \quad \frac{\mathrm{q}}{\mathrm{m}}=\frac{1.6 \times 10^{-19}}{9.1 \times 10^{-31}}=1.75 \times 10^{11} \\ & \simeq 2 \times 10^{11} \mathrm{C} / \mathrm{kg} \\ & \end{aligned}
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