Question

When exposed to electric field, particles are deviated towards the positive electrode or plate.

• A. $\alpha$
• B. $\beta$
• C. $\gamma$

Answer 1

The correct option is B $\beta$

Beta ($\beta$) particles are a stream of negatively charged particles, or simply, electrons. Hence, when they are exposed to electric field, they tend to deviate or deflect towards the positive charged electrode or plate.
Alpha ($\alpha$) particles are helium nuclei, and they deflect towards the negative electrode.
Gamma ($\gamma$) rays are electrically neutral electromagnetic rays, which shows no deviation in the presence of an electric field.