Question

The force experienced by the cathode rays when they pass through a uniform electric field of intensity $\overline{E}$ is:

• A. in the direction of the electric field
• B. in the direction opposite to that of the electric field
• C. at right angles to the electric field
• D. zero, because cathode rays do not have any charge

Answer 1

Answer: (B)

in the direction opposite to that of the electric field

Cathode particles are negatively charged
$\therefore F_E=-q\overrightarrow{E}$
Force is opposite to the direction of electric field