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  • 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, conn

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?

Option: 1

1.5 \Omega


Option: 2

5\Omega


Option: 3

6.67 \Omega


Option: 4

200 \Omega


Answers (1)

Maximum current in the circuit

\mathrm{\begin{aligned} \quad I & =P N \\ \therefore \quad & I=\frac{100 \times 10^{-3}}{0.5}=0.2 \mathrm{amp} . \end{aligned}}

\mathrm{\text { Now, } R=\frac{\text { voltage dropacross resistance }}{0.5}=\frac{1}{0.2}=5 \Omega}

Posted by

Ramraj Saini

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