AP EAMCET · PHYSICS · Semiconductors
In a transistor if \(\frac{I_C}{I_E}=\alpha\) and \(\frac{I_C}{I_B}=\beta\). If \(\alpha\) varies between \(\frac{20}{21}\) and \(\frac{100}{101}\), then the value of \(\beta\) lies between
- A \(1-10\)
- B \(0.95-0.99\)
- C \(20-100\)
- D \(200-300\)
Answer & Solution
Correct Answer
(C) \(20-100\)
Step-by-step Solution
Detailed explanation
\(\beta=\frac{\alpha}{1-\alpha}\) \(\beta_1=\frac{\frac{20}{21}}{1-\frac{20}{21}}=20, \quad \beta_2=\frac{\frac{100}{101}}{1-\frac{100}{101}}=100\) The value of \(\beta\) lies between \(20-100\).
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 cars are moving towards each other at the speed of \(50 \mathrm{~ms}^{-1}\). If one of the cars blows a horn at a frequency of \(250 \mathrm{~Hz}\), the wave length of the sound perceived by the driver of the other car is
(Speed of sound in air \(=350 \mathrm{~ms}^{-1}\) )AP EAMCET 2022 Medium - A current \(I=10 \mathrm{~A}\) is passed through the part of a circuit shown in the figure. What will be the potential difference between \(A\) and \(B\) when \(I\) is decreased at constant rate of \(10^2 \mathrm{As}^{-1}\) at the beginning ?
AP EAMCET 2020 Hard - The frequency suitable for beyond-the-horizon communication using sky waves isAP EAMCET 2019 Easy
- The average translational kinetic energy of \(\mathrm{O}_2\) molecules at a particular temperature is \(0.048 \mathrm{eV}\). The average translational kinetic energy of equal number of \(\mathrm{N}_2\) molecules at the same temperature is (in \(\mathrm{eV}\))AP EAMCET 2017 Easy
- An unpolarised beam of light incidents on a group of three polarising sheets arranged such that the angle between the axes of any two adjascent sheets is \(30^{\circ}\). The ratio of the intensities of polarised light emerging from the second and third sheets isAP EAMCET 2025 Medium
- A car of mass \(1000 \mathrm{~kg}\) having a velocity of \(10 \mathrm{~ms}^{-1}\) collides a horizontally mounted spring. If the spring constant is \(4000 \mathrm{Nm}^{-1}\), then the maximum compression of the spring isAP EAMCET 2023 Easy
More PYQs from AP EAMCET
- Three point charges \(1 \mathrm{C},-2 \mathrm{C}\) and \(-2 \mathrm{C}\) are placed at the vertices of an equilateral triangle of side 1 metre. The work done by an external force to increase the separation of the charges to 2 metre in joule is ( \(\varepsilon_0=\) permittivity of air)AP EAMCET 2004 Easy
- \(\int\left(\tan ^7 x+\tan x\right) d x=\)AP EAMCET 2024 Easy
- If the circle \(\mathrm{S}=0\) cuts the circles \(x^2+y^2-2 x+6 y=0\). \(x^2+y^2-4 x-2 y+6=0\) and \(x^2+y^2-12 x+2 y+3=0\) orthogonally, then equation of the tangent at \((0,3)\) on \(S=\) 0 isAP EAMCET 2024 Hard
- If , thenAP EAMCET 2022 Easy
- The differential equation \(y^2 d x+(2 x y-1) d y=0\) isAP EAMCET 2023 Easy
- The distance between the polar of \(P(2,3)\) with respect to the circle \(x^2+y^2-2 x-2 y+1=0\) and the polar of the inverse point of \(P\) with respect to the same circle isAP EAMCET 2019 Medium