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In which of the following cases is the p-n junction diode reverse biased?

Options

  1. Ap-side is connected to -5 V and n-side is connected to -2 V
  2. Bp-side is connected to +2 V and n-side is connected to -2 V
  3. Cp-side is connected to 0 V and n-side is connected to -3 V
  4. Dp-side is connected to -2 V and n-side is connected to -5 V

Correct answer

A. p-side is connected to -5 V and n-side is connected to -2 V

Step-by-step solution

A p-n junction diode is reverse biased when the electric potential at the p-side is lower than the electric potential at the n-side ( V_p In the first option, V_p = -5 V and V_n = -2 V . Since -5 V In the second option, V_p = +2 V and V_n = -2 V ( +2 > -2 , forward biased). In the third option, V_p = 0 V and V_n = -3 V ( 0 > -3 , forward biased). In the fourth option, V_p = -2 V and V_n = -5 V ( -2 > -5 , forward biased). Answer: p-side is connected to -5 V and n-side is connected to -2 V

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