Question:
The special purpose diode operated / working under forward bias is / are
The special purpose diode operated / working under forward bias is / are
Updated On: Apr 7, 2025
- zender diode and LED
- photo diode and LED
- zener diode and solar cell
- LED
- photo diode
Show Solution
Verified By Collegedunia
The Correct Option is D
Approach Solution - 1
A diode works under forward bias when a positive voltage is applied to the anode, allowing current to flow through the diode.
- Zener diode operates in reverse bias, where it allows current to flow in reverse direction when a certain breakdown voltage is reached. Therefore, it does not work under forward bias.
- LED (Light Emitting Diode) works under forward bias, and it emits light when current passes through it.
- Photo diode operates in reverse bias, where it generates current in response to light.
- Solar cell works under reverse bias as well.
Thus, the correct answer is LED, which operates under forward bias.
The correct option is (D) : LED
Was this answer helpful?
0
0
Show Solution
Verified By Collegedunia
Approach Solution -2
The Light Emitting Diode (LED) is a special-purpose diode that operates under forward bias. When forward biased, it emits light due to recombination of electrons and holes in the semiconductor material.
Other special-purpose diodes like:
- Zener diode: typically used in reverse bias for voltage regulation.
- Photo diode: used in reverse bias to detect light.
- Solar cell: operates like a photodiode in reverse bias generating current from light.
✅ Correct Answer: LED
Was this answer helpful?
0
0
Top KEAM Physics Questions
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- Two capillary tubes A and B of diameter $1\, mm$ and $2\, mm$ respectively are dipped vertically in a liquid. If the capillary rise in A is 6 cm, then the capillary rise in B is
- In the circuit given in figure, 1 and 2 are ammeters. Just after key K is pressed to complete the circuit, the reading will be
- A plate has a length $ 5\pm 0.1\text{ }cm $ and breadth $ 2\pm 0.01\text{ }cm $ . Then the area of the plate is:
View More Questions
Top KEAM Semiconductor electronics: materials, devices and simple circuits Questions
- For a Zener diode
- Identify the mismatched pair from the following
- If the rms value of sinusoidal input to a full wave rectifier is $\frac{V_0} { \sqrt{2}}$ then the rms value of the rectifier?s output is
- In n- p-n transistor, the collector current is 10 mA. If 90% of the electrons emitted reach the collector, then
- The electrical conductivity of an intrinsic semiconductor at 0K is
View More Questions
Top KEAM Questions
- i.$\quad$ They help in respiration ii.$\quad$ They help in cell wall formation iii.$\quad$ They help in DNA replication iv. $\quad$They increase surface area of plasma membrane Which of the following prokaryotic structures has all the above roles?
- A body oscillates with SHM according to the equation (in SI units), $x = 5 cos \left(2\pi t +\frac{\pi}{4}\right) .$ Its instantaneous displacement at $t = 1$ second is
- The pH of a solution obtained by mixing 60 mL of 0.1 M BaOH solution at 40m of 0.15m HCI solution is
Kepler's second law (law of areas) of planetary motion leads to law of conservation of
- If $\int e^{2x}f' \left(x\right)dx =g \left(x\right)$, then $ \int\left(e^{2x}f\left(x\right) + e^{2x} f' \left(x\right)\right)dx =$
View More Questions