JEE Mains · Physics · STD 12 - 14. Semicondutor electronics
The reading of the ammeter for a silicon diode in the given circuit is.......\(mA\)
- A \(15\)
- B \(13.5 \)
- C \(11.5\)
- D \(0\)
Answer & Solution
Correct Answer
(C) \(11.5\)
Step-by-step Solution
Detailed explanation
Clearly from fig. given in question, Silicon diode is in forward bias. \(\therefore\) Potential barrier across diode \(\Delta \mathrm{V}=0.7 \mathrm{volts}\) Current, \(I=\frac{V-\Delta V}{R}=\frac{3-0.7}{200}\) \(=\frac{2.3}{200}=11.5 \mathrm{mA}\)
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 convex lens of refractive index 1.5 and focal length \(f=18 cm\) is immersed in water. The difference in focal lengths of the given lens when it is in water and in air is \(\alpha \times f\). The value of \(\alpha\) is ___________.
(refractive index of water \(=4 / 3\) )JEE Mains 2026 Medium - A solid sphere of radius 10 cm is rotating about an axis which is at a distance 15 cm from its centre. The radius of gyration about this axis is \(\sqrt{n}\) cm. The value of n isJEE Mains 2026 Easy
- Match List-I with List-II.
Choose the correct answer from the options given below :List-I List-II A. Coefficient of viscosity I. \(\left[ ML ^{-1} T^{-2}\right]\) B. Surface tension II. \(\left[ ML ^2 T^{-2}\right]\) C. Pressure III. \(\left[ ML ^0 T^{-2}\right]\) D. Surface energy IV. \(\left[ ML ^{-1} T^{-1}\right]\) JEE Mains 2026 Hard - The equation of the electric field of an electromagnetic wave propagating through free space is given by :
E \(=\sqrt{377} \sin \left(6.27 \times 10^3 t -2.09 \times 10^{-5} x \right)\) N/C
he average power of the electromagnetic wave is\(\left(\frac{1}{\alpha}\right) W / m ^2\). The value of \(\alpha\) is ___________
\(\left(\right.\) Take \(\sqrt{\frac{\mu_0}{\varepsilon_0}}=377\) in SI units \()\)JEE Mains 2026 Medium - A proton and an \(\alpha\) -particle, having kinetic energies \(K _{ p }\) and \(K _{\alpha},\) respectively, enter into \(a\) magnetic field at right angles. The ratio of the radii of trajectory of proton to that of \(\alpha\) -particle is \(2: 1 .\) The ratio of \(K _{ p }: K _{\alpha}\) is :JEE Mains 2021 Medium
- A plane electromagnetic wave travels in free space along the \(x -\) direction. The electric field component of the wave at a particular point of space and time is \(E =6\; Vm^{-1}\) along \(y -\) direction. Its corresponding magnetic filed component, \(B\) would beJEE Mains 2019 Medium
More PYQs from JEE Mains
- If the circles \({x^2}\, + {y^2}\, - 16x\, - 20y\, + \,164\,\, = \,\,{r^2}\) and \({(x - 4)^2} + {(y - 7)^2} = 36\) intersect at two distinct points, thenJEE Mains 2019 Hard
- A closed and an open organ pipe have same lengths. If the ratio of frequencies of their seventh overtones is \(\left(\frac{a-1}{a}\right)\) then the value of \(a\) is _______.JEE Mains 2024 Medium
- A capacitor is made of a tlat plate of area \(A\) and a second plate having a stair-like structure as shown in figure. If the area of each stair is \(\frac{A}{3}\) and the height is \(\mathrm{d}\), the capacitance of the arrangement is _______.
JEE Mains 2024 Hard - Let \(N\) denote the set of all natural numbers. Define two binary relations on \(N\) as \(R_1 = \{(x,y) \in N \times N : 2x + y= 10\}\) and \(R_2 = \{(x,y) \in N\times N : x+ 2y= 10\} \). ThenJEE Mains 2018 Hard
- Match list-\(I\) with list-\(II\):
(Where \(\mathrm{a}=\) radius of planet orbit, \(\mathrm{r}=\) radius of planet, \(M=\) mass of Sun, \(m=\) mass of planet)List-\(I\) List-\(II\) \((A)\)Kinetic energy of plant \((I)\) \(-\frac{\mathrm{GMm}}{\mathrm{a}}\) \((B)\) Gravaitatioin potentiyal energy of sun -plant system \((II)\) \(\frac{\mathrm{GMm}}{2 \mathrm{a}}\) \((C)\)Total mecaniacal energy of palnt \((III)\) \(\frac{\mathrm{Gm}}{\mathrm{r}}\) \((D)\)Escap energyat the surface of plant for unit mass object \((IV)\) \(-\frac{\mathrm{GMm}}{2 \mathrm{a}}\)
Choose the correct answer from the options given below:JEE Mains 2024 Hard - A plane \(P\) meets the coordinate axes at \(A, B\) and \(C\) respectively. The centroid of \(\Delta ABC\) is given to be \((1,1,2)\) . Then the equation of the line through this centroid and perpendicular to the plane \(P\) isJEE Mains 2020 Hard