AP EAMCET · PHYSICS · Semiconductors
In the following common emitter circuit, and . If is negligible, then the base current is 
- A
- B
- C
- D
Answer & Solution
Correct Answer
(B)
Step-by-step Solution
Detailed explanation
The figure below represents the common emitter circuit, Apply Kirchhoff law, -15+2IC+VCE=0 -15+2Ic+7=0 IC=4 mA The common emitter gain is, β=ICIB 100=4×10-3IB IB=0.04 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
- Two uniform stretched steel strings \(A\) and \(B\) are vibrating under the same tension. The first overtone of \(A\) is equal to the second overtone of \(B\). If the radius of \(A\) is twice that of \(B\), then the ratio of the lengths of the strings isAP EAMCET 2018 Medium
- Under standard conditions, the density of a gas is \(\frac{1400}{1089} \mathrm{~kg} \mathrm{-} \mathrm{m}^{-3}\) and the speed of sound propagation in it is \(330 \mathrm{~ms}^{-1}\), then the number of degrees of freedom of the gas molecules isAP EAMCET 2019 Easy
- A particle of mass \(1 \times 10^{-30} \mathrm{~kg}\) and electric change \(1.6 \times 10^{-19} \mathrm{C}\) has de-Broglie wavelength \(660 \mathrm{~nm}\). Then kinetic energy of this particle is
(Planck's constant, \(h=6.6 \times 10^{-34} \mathrm{~J}-\mathrm{s}\) )AP EAMCET 2022 Easy - Consider three masses \(m_1, m_2\) and \(m_3\left(m_1>m_2>m_3\right)\) are at rest on a horizontal plane as shown in the figure. Now the angle of inclination \((\theta)\) of the plane is gradually increased until the masses just begin to slide. (Assume the coefficient of static friction between the masses and the surface is constant).
Then the correct statement of the following is
AP EAMCET 2022 Medium - The half life of a radioactive nuclide isAP EAMCET 2022 Easy
- The Lenz's law givesAP EAMCET 2020 Easy
More PYQs from AP EAMCET
- \(\int \frac{\mathrm{dx}}{(\mathrm{x}+1) \sqrt{\mathrm{x}^2+1}}=\)AP EAMCET 2025 Medium
- A coil of inductance and resistance is connected to a source of and . The phase difference between the voltage maximum and the current maximum isAP EAMCET 2022 Easy
- Thermite is a mixture of \(X\) parts of ferric oxide and \(Y\) parts of aluminium powder. \(X, Y\) respectively areAP EAMCET 2002 Medium
- If the system of simultaneous linear equations \(\mathrm{x}+\mathrm{y}+\mathrm{z}=\lambda, 5 \mathrm{x}-\mathrm{y}+\mu \mathrm{z}=10\) and \(2 \mathrm{x}+3 \mathrm{y}-\mathrm{z}=6\) has unique solution, thenAP EAMCET 2022 Easy
- Let \(\alpha, \beta\) be two real number such that \(\pi < (\alpha-\beta) < 3 \pi\). If \(\sin \alpha+\sin \beta=\frac{-21}{65}\) and \(\cos \alpha+\cos \beta=\frac{-2}{65}\), then \(\cos \left(\frac{\beta-\alpha}{2}\right)=\)AP EAMCET 2022 Medium
- If \(\tan x+\tan \left(x+\frac{\pi}{3}\right)+\tan \left(x+\frac{2 \pi}{3}\right)=3\) then \(\tan 3 x\) is equal toAP EAMCET 2012 Medium