Electronic Devices Question 200
Question: $ 14\times 10^{15} $ electrons reach the anode per second. If the power consumed is 448 milliwatts, then the plate (anode) voltage is
[MP PMT 1989]
Options:
A) 150 V
B) 200V
C) $ 14\times 448V $
D) 448/14V
Show Answer
Answer:
Correct Answer: B
Solution:
$ P=Vi\Rightarrow V=\frac{P}{i}=\frac{448\times {{10}^{-3}}}{14\times 10^{15}\times 1.6\times {{10}^{-19}}}=200V $
