Question

Ratio of charge on positron to mass of positron is approximately.

• A. $+2\times 10^{11}$
• B. $+5\times 10^{12}$
• C. $-2\times 10^{11}$
• D. $-5\times 10^{11}$

Answer 1

Answer: (A)

Positron has an electric charge of perpendicular and has the same mass as an electron.
So, $\frac{q}{m}=\frac{e}{m}$
$=\frac{1.6\times 10^{-19}}{9.1\times 10^{-31}}=+1.75\times 10^{11}$