Question

The potential difference applied to an x-ray tube is 5 KV and the current through it is 32 mA. The number of electrons striking the target per second is $(e=1.6\times {10}^{-19}C)$

• A. $1.6\times {10}^6{s}^{-1}$
• B. $2\times {10}^{-6}{s}^{-1}$
• C. $4\times {10}^{16}{s}^{-1}$
• D. $2\times {10}^{16}{s}^{-1}$

Answer 1

The correct option is D $2\times {10}^{16}{s}^{-1}$

Current $I=\frac{ne}{t}\frac{n}{t}=\frac{i}{e}=\frac{3.2\times {10}^{-3}}{1.6\times {10}^{-19}}=2\times {10}^{16}{s}^{-1}$