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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/V \\ & \therefore \quad I=\frac{100 \times 10^{-3}}{0.5}=0.2 \mathrm{amp} . \\ & \text { Now, } \mathrm{R}=\frac{\text { voltage drop across resistance }}{0.5}=\frac{1}{0.2}=5 \Omega \end{aligned}}

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Kshitij

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