JEE Mains · Physics · STD 12 - 14. Semicondutor electronics
The photodiode is used to detect the optiocal signals. These diodes are preferably operated in reverse biased mode because.
- A fractional change in majority carriers produce higher forward bias current
- B fractional change in majority carriers produce higher reverse bias current
- C fractional change in minority carriers produce higher forward bias current
- D fractional change in minority carriers produce higher reverse bias current
Answer & Solution
Correct Answer
(D) fractional change in minority carriers produce higher reverse bias current
Step-by-step Solution
Detailed explanation
Very small change in minority charge carriers produces high value of reverse bias current.
See the Complete Solution
Get step-by-step explanations for this and 2.5 Lakh+ more JEE, NEET & CET questions.
- Unlock all solutions
- Practice the full chapter
- Track accuracy across PYQs
4.8 rated on Google Play · 14,000+ reviews
More questions from Physics
- A train starting from rest first accelerates uniformly up to a speed of \(80 \mathrm{~km} / \mathrm{h}\) for time \(t\), then it moves with a constant speed for time 3t. The average speed of the train for this duration of journey will be (in \(\mathrm{km} / \mathrm{h}\) ) _______.JEE Mains 2024 Hard
- A capacitor is connected to a \(20\, {V}\) battery through a resistance of \(10\, \Omega .\) It is found that the potential difference across the capacitor rises to \(2\, {V}\) in \(1\, \mu {s}\). The capacitance of the capacitor is \(....\,\mu {F}\) Given : \(\ln \left(\frac{10}{9}\right)=0.105\)JEE Mains 2021 Hard
- A compound microscope is designed with two symmetric biconvex lenses. The objective lens is cut vertically, creating two identical plano-convex lenses. One of them is used in place of original objective lens. To retain same magnification keeping the object distance unchanged, the tube length has to beJEE Mains 2026 Hard
- The given circuit works as :
JEE Mains 2026 Easy - For a diatomic gas, if \(\gamma_1=\left(\frac{C p}{C v}\right)\) for rigid molecules and \(\gamma_2=\left(\frac{C p}{C v}\right)\) for another diatomic molecules, but also having vibrational modes. Then, which one of the following options is correct ? (Cp and Cv are specific heats of the gas at constant pressure and volume)JEE Mains 2025 Medium
- A ball is released from a height \(h\). If \(t_{1}\) and \(t_{2}\) be the time required to complete first half and second half of the distance respectively. Then, choose the correct relation between \(t_{1}\) and \(t_{2}\).JEE Mains 2022 Hard
More PYQs from JEE Mains
- The number of non-empty equivalence relations on the set \(\{1,2,3\}\) is :JEE Mains 2025 Easy
- Let the foci of the ellipse \(\frac{x^{2}}{16}+\frac{y^{2}}{7}=1\) and the hyperbola \(\frac{ x ^{2}}{144}-\frac{ y ^{2}}{\alpha}=\frac{1}{25}\) coincide. Then the length of the latus rectum of the hyperbola is:-JEE Mains 2022 Medium
- An object of mass \(1 kg\) is taken to a height from the surface of earth which is equal to three times the radius of earth. The gain in potential energy of the object will be \(....MJ\)[If, \(g =10\,ms ^{-2}\) and radius of earth \(=6400\,km\) ]JEE Mains 2022 Medium
- The general solution of the differential equation \((y^2 -x^3) dx -xydy = 0\, (x \ne 0)\) is (where \(c\) is a constant of integration)JEE Mains 2019 Hard
- A solid cylinder of mass \(m\) is wrapped with an inextensible light string and, is placed on a rough inclined plane as shown in the figure. The frictional force acting between the cylinder and the inclined plane is: [The coefficient of static friction, \(\mu_{ s },\) is \(\left.0.4\right]\)
JEE Mains 2021 Hard - Let an ellipse with centre \((1,0)\) and latus rectum of length \(\frac{1}{2}\) have its major axis along \(x\)-axis. If its minor axis subtends an angle \(60^{\circ}\) at the foci, then the square of the sum of the lengths of its minor and major axes is equal to \(...........\).
JEE Mains 2023 Hard