The diode used in the circuitshown in the figure has a constant voltage drop at 0.5 V at all currents and a maximumpower rating of 100 milliwatts. What should be the value of the resistor R, connected in series with diode, for obtaining maximum current?

The diode used in the circuitshown in the figure has a constant voltag

1.	The diode used in the circuitshown in the figure has a constant voltage drop at 0.5 V at all currents and a maximumpower rating of 100 milliwatts. What should be the value of the resistor R, connected in series with diode, for obtaining maximum current?
Answer» 6.76 `Omega` 20`Omega` 5`Omega` 5.6`Omega` Solution :As `R_D=V_D^2/P_D =(0.5V)^2/(0.1 W)=2.5 Omega` So, CURRENT , `I_D=V_D/R_D`=0.2 A TOTAL resistance required in the circuit , `R_(eq)=V/I_D=1.5/0.2=7.5 Omega` `therefore` Resistance of the SERIES resistor , `R=R_(eq)-R_D` = 7.5-2.5 = 5 `Omega`

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The diode used in the circuitshown in the figure has a constant voltage drop at 0.5 V at all currents and a maximumpower rating of 100 milliwatts. What should be the value of the resistor R, connected in series with diode, for obtaining maximum current?

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