Question

State whether true or false :

$\frac{e}{m}$ ratio of proton is greater than that of electron.

• A. True
• B. False

Answer 1

The correct option is B False

The charge-to-mass ratio $\left(\frac{e}{m}\right)$ of an object is, as its name implies, the charge of an object divided by the mass of the same object.

The $\frac{e}{m}$ ratio of an electron is always greater than a proton because the electron is 1840 times lighter than the proton. The $\frac{e}{m}$ of a particle increases when the mass decreases and when the mass increases, the $\frac{e}{m}$ ratio decreases.

Since the charge on both the proton and electron are the same.

Therefore, the ratio will depend on the mass of the electron and proton.

Hence, $\frac{e}{m}$ ratio of electron (being lighter) is greater than proton.