The potential difference between cathode and anode in a cathode ray tube is . The speed acquired by — Atomic Structure Chemistry Question

💡 Solution & Explanation

The kinetic energy acquired by an electron accelerated through potential $V$ is $K.E. = eV = \frac{1}{2}mv^2$. Solving for speed, $v = \sqrt{\frac{2eV}{m}}$, which means $v \propto \sqrt{V}$. Therefore, correct answer is B.