Home/
Competitive Exams/
JEE Main & Advanced/
Physics/
Semiconductors/
Question 20220
JEE Physics · Easy

Semiconductors: Diode Equation MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
Diode EquationEasyQuestion 20220

Question

The ideal diode current equation is:
  1. A
    I = I₀(e^(V/V_T) + 1)
  2. B
    I = I₀(e^(V/V_T) − 1)
    Correct
  3. C
    I = V/R
  4. D
    I = I₀ e^(−V/V_T)

Correct answer

I = I₀(e^(V/V_T) − 1)

Explanation

Shockley diode equation: I = I₀(e^(qV/kT) − 1) where V_T = kT/q ≈ 26 mV at room temperature. Forward bias V > 0 → exponential current growth. Reverse bias V < 0 → I ≈ −I₀ (saturation).

Review Semiconductors notesStart timed chapter practice