A Zener diode with a breakdown voltage of $4 \mathrm{V}$ is connected in series with a resistance $R$ to a battery of emf $10 \mathrm{V}$. The maximum power dissipation rating for the Zener diode is $1 \mathrm{W}$. The value of $R$ to ensure maximum power dissipation across the diode is

• A

  $12 \mathrm{\Omega }$
• Correct answer
  B

  $24 \mathrm{\Omega }$
• C

  $36 \mathrm{\Omega }$
• D

  $6 \mathrm{\Omega }$

Hence, the correct answer is option: 'B'.