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The diode used in a circuit shown in the figure has a constant voltage drop at 0.5 V at all currects and a maximum power rating of 100 milliwatts. What should be the value of the resistor R, connected in series with diode, for obtaining maximum current
A. |
`6.7 Omega` |
B. |
`20 Omega` |
C. |
`5 Omega` |
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D. |
`5.6 Omega` |