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 $100 \, mW$. What should be the value of the resistor $R$,connected in series with the diode,to obtain the maximum current?

  • A
    $1.5 \, \Omega$
  • B
    $5 \, \Omega$
  • C
    $6.67 \, \Omega$
  • D
    $200 \, \Omega$

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