Question

The increasing order of specific charge of electron (e), proton (p), alpha partial ($\alpha$) and neutron (n) is:

• A. e, p, n, $\alpha$
• B. n, p, e, $\alpha$
• C. n, $\alpha$, p, e
• D. n, p, $\alpha$, e

Answer 1

The correct option is C n, $\alpha$, p, e

$\frac{charge}{mass}=specificchange$

Neutron has no charge $\frac{e}{m}=0$

$\to \alpha$- Particle $\frac{e}{m}\left(H{e}^{+2}\right)$ has very high mass compared to proton and electron, therefore $\left(\frac{e}{m}\right)$

Ratio is small.

$\to$ electron has negative charge so $\left(\frac{e}{m}\right)$

But magnitude is higher than proton because mass of proton is greater than electron so $\to n<\alpha <p<e$