Question

A charged particle is in the electric field experiences a electric force. All particles which are given below are kept in the electric field of same strength. Which of the following particles would experience the greatest electric force?

• A. proton
• B. electron
• C. alpha particle
• D. neutron
• E. photon

Answer 1

The correct option is C alpha particle

The electric force experienced by a charged particle in an electric field is given by $\overrightarrow{F}=q\overrightarrow{E}$.

Thus the force experienced is proportional to the charge of the particle.

Electron and proton have same charge equal to $e$.

Neutron and photon are chargeless species.

An alpha particle has charge $2e$.

Hence the force experienced by alpha particle is largest.