1. Tardigrade
  2. Question
  3. Physics
  4. In the circuit shown if current for the diode is 20 μ A, the potential difference across the diode is <img class=img-fluid question-image alt=image src=https://cdn.tardigrade.in/img/question/physics/59d6a79c62c0dcf8ee58152cd130ebd9-.png />

Question Error Report

Thank you for reporting, we will resolve it shortly

Back to Question

Q. In the circuit shown if current for the diode is $20 \,\mu A$, the potential difference across the diode is
image

Semiconductor Electronics: Materials Devices and Simple Circuits

Solution:

Since the diode is reversed biased, only drift current exists in circuit which is $20 \,\mu A$.
Potential drop across $15 \,\Omega$ resistor, $= 15 \,\Omega \times 20\, \mu A$
$= 300\, \mu V = 0.0003 \,V$
Potential difference across the diode
$= 4 - 0.0003 = 3.99 = 4\, V$