Semiconducting Devices Question 38
Question: The diode used in the circuit shown in the figure has a constant voltage drop of 0.5 V at all currents and a maximum power rating of 100 milliwatts. What should be the value of the resistor R, connected in series with the diode for obtaining maximum current
[CBSE PMT 1997]
Options:
A) 1.5 W
B) 5 W
C) 6.67 W
D) 200 W
Show Answer
Answer:
Correct Answer: B
Solution:
The current through circuit $ i=\frac{P}{V}=\frac{100\times {{10}^{-3}}}{0.5}=0.2A $
voltage drop across resistance = 1.5 -0.5 = 1 V
Therefore $ R=\frac{1}{0.2}=5\Omega $ .
