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The diode used in the circuit shown in t...

The diode used in the circuit shown in the figure has a constant voltage drop of `1 `V at all current and a maximum power rating of `100 mW`. What should be the value of the resistor R, connected in series with the diode for obtaining maximum current put less l?

Text Solution

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Current through diode(or circuit) ,` l = ("Power")/ ("Voltage")`
therefore` `l = 100xx 10 ^(-3) W/1 V` = `0.1 A`
And resistance R = `("Net voltage")/ ("Current")`
= `1.5 -1 /0.1 ` = `50 Omega`.
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