Current Electricity Charging Discharging Of Capacitors Question 399
Question: The charge of an electron is 1.6 × 10?19 C. How many electrons strike the screen of a cathode ray tube each second when the beam current is 16 mA
[AMU (Med.) 2000]
Options:
A) $ 10^{17} $
B) $ 10^{19} $
C) $ 10^{19} $
D) $ 10^{17} $
Show Answer
Answer:
Correct Answer: A
Solution:
$ i=\frac{ne}{t}\Rightarrow 16\times {{10}^{-3}}=\frac{n\times 1.6\times {{10}^{-19}}}{1} $
$ \Rightarrow n=10^{17} $
BETA
