JEE Mains · Physics · STD 12 - 14. Semicondutor electronics
A diode has Zener voltage of \(10\) V and maximum power dissipation of \(0.5\) W, then the minimum resistance to be used in series with this diode for safety when it is connected to a \(25\) V power supply is ______ \(\Omega\).
- A 300
- B 600
- C 900
- D 1200
Answer & Solution
Correct Answer
(A) 300
Step-by-step Solution
Detailed explanation
Given Zener voltage \(V_Z = 10\) V and maximum power dissipation \(P_{max} = 0.5\) W. The maximum safe current through the Zener diode is given by \(I_{max} = \dfrac{P_{max}}{V_Z} = \dfrac{0.5}{10} = 0.05\) A. The voltage drop across the series resistor is…
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
- Two light beams fall on a transparent material block at point 1 and 2 with angle \(\theta_1\) and \(\theta_{2^{\prime}}\) respectively, as shown in figure. After refraction, the beams intersect at point 3 which is exactly on the interface at other end of the block. Given : the distance between 1 and 2, \(\mathrm{d}=4 \sqrt{3} \mathrm{~cm}\) and \(\theta_1=\theta_2=\cos ^{-1}\left(\frac{\mathrm{n}_2}{2 \mathrm{n}_1}\right)\), where refractive index of the block \(\mathrm{n}_2\gt\) refractive index of the outside medium \(\mathrm{n}_1\), then the thickness of the block is ________ cm.
JEE Mains 2025 Hard - Two thin convex lenses of focal length 30 cm and 10 cm are placed coaxially, 10 cm apart. The power of this combination is :JEE Mains 2025 Medium
- The energy of an electron in an orbit of the Bohr's atom is \(-0.04 E _0 eV\) where \(E _0\) is the ground state energy. If \(L\) is the angular momentum of the electron in this orbit and h is the Planck's constant, then \(\frac{2 \pi L}{ h }\) is _________ :JEE Mains 2026 Easy
- A solid disc of radius \(20 \,{cm}\) and mass \(10\, {kg}\) is rotating with an angular velocity of \(600\, {rpm}\), about an axis normal to its circular plane and passing through its centre of mass. The retarding torque required to bring the disc at rest in \(10\, {s}\, ......\, \pi \times \,10^{-1}\, {Nm}\).JEE Mains 2021 Medium
- Number of photons of equal energy emitted per second by a 6 mW laser source operating at 663 nm is ___________.
(Given: \(h=6.63\times10^{-34}\) J.s and \(c=3\times10^{8}m/s\))JEE Mains 2026 Hard - A body is moving in a low circular orbit about a planet of mass \(M\) and radius \(R\). The radius of the orbit can be taken to be \(R\) it self. Then the ratio of the speed of this body in the orbit to the escape velocity from the planet isJEE Mains 2020 Medium
More PYQs from JEE Mains
- Let the first term of a series be \(T_1=6\) and its \(\mathrm{r}^{\text {th }}\) term \(T_r=3 T_{r-1}+6^r, r=2,3, \ldots . ., n\). If the sum of the first \(\mathrm{n}\) terms of this series is \(\frac{1}{5}\left(n^2-12 n+39\right)\) \(\left(4.6^n-5.3^n+1\right)\). Then \(n\) is equal to ...........JEE Mains 2024 Hard
- Let \(\alpha=\sum_{k=0}^n\left(\frac{\left({ }^n C_k\right)^2}{k+1}\right)\) and \(\beta=\sum_{k=0}^{n-1}\left(\frac{{ }^n C_k{ }^n C_{k+1}}{k+2}\right)\). If \(5 \alpha=6 \beta\), then \(n\) equalsJEE Mains 2024 Hard
- If \(P (6,1)\) be the orthocentre of the triangle whose vertices are \(A (5,-2), B (8,3)\) and \(C ( h , k )\), then the point \(C\) lies on the circle:JEE Mains 2024 Medium
- A hollow sphere is rolling on a plane surface about its axis of symmetry. The ratio of rotational kinetic energy to its total kinetic energy is \(\frac{x}{5}\). The value of \(x\) is _______.JEE Mains 2024 Hard
- The sum of all the real values of \(x\) satisfying the equation \({2^{\left( {x - 1} \right)\left( {{x^2} + 5x - 50} \right)}} = 1\) isJEE Mains 2017 Hard
- A flask contains hydrogen and oxygen in the ratio of \(2: 1\) by mass at temperature \(27^{\circ} C\). The ratio of average kinetic energy per molecule of hydrogen and oxygen respectively is :JEE Mains 2023 Easy