Read the following statements describing the potential configurations of a p-n junction diode: (A) The p-side is earthed and the n-side is at -2 V . (B) The p-side is at -3 V and the n-side is at -1 V . (C) The p-side is at +2 V and the n-side is at +5 V . (D) The p-side is at -1 V and the n-side is at -4 V . How many of the given statements describe a reverse-biased diode?

Step-by-step solution

A diode is reverse-biased when the potential at the p-side ( V_p ) is less than the potential at the n-side ( V_n ). Statement (A): V_p = 0 V (earthed), V_n = -2 V . Since 0 > -2 , it is forward-biased. Statement (B): V_p = -3 V , V_n = -1 V . Since -3 Statement (C): V_p = 2 V , V_n = 5 V . Since 2 Statement (D): V_p = -1 V , V_n = -4 V . Since -1 > -4 , it is forward-biased. Statements (B) and (C) describe a reverse-biased diode. Therefore, exactly two statements are correct. Answer: Two