Question

A potential difference of $15000\text{V}$ is applied across the ends of a copper target. The speed of the emitted X-Rays inside the tube is -

Assume standard values.

• A. $3\times {10}^8\text{m/s}$
• B. $3\times {10}^7\text{m/s}$
• C. $3\times {10}^6\text{m/s}$
• D. $3\times {10}^5\text{m/s}$

Answer 1

The correct option is A $3\times {10}^8\text{m/s}$

X-rays are produced in vacuum tube, and it is an electromagnetic wave which travel in vacuum with a speed of $3\times {10}^8\text{m/s}$.

Hence, option $\left(A\right)$ is the correct answer.