Electronic Devices Question 232

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 $ .



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