AP EAMCET · PHYSICS · Semiconductors
In the following common emitter circuit, if \(\beta=100, V_{C E}=-7 \mathrm{~V}, V_{B E}\) is negligible, \(R_C=2 \mathrm{k} \Omega\), then \(I_B=\) ?
- A \(0.01 \mathrm{~mA}\)
- B \(0.04 \mathrm{~mA}\)
- C \(0.02 \mathrm{~mA}\)
- D \(0.03 \mathrm{~mA}\)
Answer & Solution
Correct Answer
(B) \(0.04 \mathrm{~mA}\)
Step-by-step Solution
Detailed explanation
\(\begin{aligned} & \text { Given that, } V_{C E}=-7 \mathrm{~V}, \beta=100 \\ & \qquad R_C=2 \mathrm{k} \Omega=2000 \Omega, V_{C C}=15 \mathrm{~V}\end{aligned}\) We know that, the current gain in common emitter circuit is \[ \beta=I_C / I_B...(i) \] By KVL in right loop,…
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
- Along the X-axis, three charges \(\frac{q}{2},-q\) and \(\frac{q}{2}\) are placed at \(x=0, x=a\) and \(x=2 a\) respectively. The resultant electric potential at \(x=a+r\) (if \(a< < r)\) is : ( \(\varepsilon_0\) is the permittivity of free space)AP EAMCET 2006 Medium
- A body of mass \(2 \mathrm{~kg}\) is acted upon by two forces each of magnitude \(1 \mathrm{~N}\), making an angle of \(60^{\circ}\) with each other. The net acceleration of the body (in \(\mathrm{ms}^{-2}\) ) isAP EAMCET 2021 Medium
- What is the height from the surface of earth, where acceleration due to gravity will be \(\frac{1}{4}\) of that of the earth? \(\left(R_E=6400 \mathrm{~km}\right)\)AP EAMCET 2024 Easy
- The current in an inductor of self-inductance \(L=40 \mathrm{mH}\) is to be increased uniformly from \(2 \mathrm{~A}\) to \(12 \mathrm{~A}\) in \(8 \mathrm{~ms}\). The emf induced in the inductor during this process isAP EAMCET 2021 Medium
- A \(2 \mathrm{~kg}\) ball moving at \(24 \mathrm{~ms}^{-1}\) undergoes inelastic head-on collision with a \(4 \mathrm{~kg}\) ball moving in the opposite direction at \(48 \mathrm{~ms}^{-1}\). If the coefficient of restitution is \(2 / 3\), their velocities in \(\mathrm{ms}^{-1}\) after impact areAP EAMCET 2004 Easy
- The speed of ripples on water surface depends on surface tension , density , and wavelength . Then the square of speed is proportional toAP EAMCET 2021 Medium
More PYQs from AP EAMCET
- Which of the following functions are odd?
I. \(f(x)=x\left(\frac{e^x-1}{e^x+1}\right)\)
II. \(f(x)=k^x+k^{-x}+\cos x\)
III. \(f(x)=\log \left(x+\sqrt{x^2+1}\right)\)AP EAMCET 2024 Easy - The energy stored in a coil of inductance \(L\) carrying a steady current \(i\) is in the formAP EAMCET 2020 Easy
- If the equation \(2 x^3+5 x^2-4 x-12=0\) has a repeated root, then the constant term of the quadratic equation whose roots are the distinct roots of the given equation isAP EAMCET 2023 Medium
- \(1-\frac{2}{3}+\frac{2.4}{3.6}-\frac{2.4 .6}{3.6 .9}+\ldots \infty=\)AP EAMCET 2024 Easy
- A window used to thermally insulate a room from outside consists of two parallel glass sheets each of area \(2.6 \mathrm{~m}^2\) and thickness \(1 \mathrm{~cm}\) separated by \(5 \mathrm{~cm}\) thick stagnant air. In the steady state, the room glass interface is at \(18^{\circ} \mathrm{C}\) and the glass-outdoor interface is at \(-2{ }^{\circ} \mathrm{C}\). If the thermal conductivities of glass and air are respectively \(0.8 \mathrm{Wm}^{-1} \mathrm{~K}^{-1}\) and \(0.08 \mathrm{Wm}^{-1} \mathrm{~K}^{-1}\), the rate of flow of heat through the window isAP EAMCET 2019 Hard
- The substitution \(x=v y\) converts which one of the following differential equation to an equation solvabie by variable separable method?AP EAMCET 2023 Easy