AP EAMCET · PHYSICS · Semiconductors
In the common-base configuration, a transistor has current amplification factor 0.95 . If the transistor is used in common-emitter configuration and base current changes by \(2 \mu \mathrm{A}\), then the change in the collector current is
- A \(19 \mu \mathrm{A}\)
- B \(0.91 \mu \mathrm{A}\)
- C \(1.9 \mu \mathrm{A}\)
- D \(38 \mu \mathrm{A}\)
Answer & Solution
Correct Answer
(D) \(38 \mu \mathrm{A}\)
Step-by-step Solution
Detailed explanation
Given, \(\alpha=0.95\) So, \[ \begin{aligned} \beta & =\frac{\alpha}{1-\alpha}=\frac{0.95}{1-0.95}=19 \\ & =\beta=\frac{\Delta I_C}{\Delta I_B}=19 \end{aligned} \] or \(\Delta I_C=19 \times 2=38 \mu \mathrm{A}\)
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
- The RMS value of emf given by volt isAP EAMCET 2018 Medium
- The heat energy supplied to a diatomic gas at constant pressure is \(210 \mathrm{~J}\), then the work done by the gas isAP EAMCET 2023 Easy
- Radius of gyration of a thin uniform rod of length ' \(L\) ' about an axis passing through its centre and perpendicular to its length isAP EAMCET 2025 Easy
- A circuit containing inductance of \(\frac{1}{6 \pi} \mathrm{H}\) and a resistance of \(15 \Omega\) in series. If an \(A C\) voltage of \(100 \mathrm{~V}\) and \(60 \mathrm{~Hz}\) is applied to above circuit, then the current in the circuit and phase difference between voltage and current respectively areAP EAMCET 2022 Easy
- Weak nuclear force always operates betweenAP EAMCET 2020 Easy
- If a \(4 \mathrm{~kg}\) of ice is inside a closed cubical thermocol box of side length \(20 \mathrm{~cm}\) and wall thickness \(4 \mathrm{~cm}\) then the mass of the ice remaining after 10 hours is nearly
(The out side temperature \(=50^{\circ} \mathrm{C}\)
co-efficient of thermal conductivity of thermocol \(=0.01 \mathrm{Js}^{-1} \mathrm{~m}^{-1{ }^{\circ}} \mathrm{C}^{-1}\)
Latent heat of fusion of ice \(=335 \times 10^3 \mathrm{~J} \mathrm{~kg}^{-1}\))AP EAMCET 2017 Medium
More PYQs from AP EAMCET
- The electric field due to a short electric dipole at a distance \(r\) on the axial line from its mid-point is \(x\) times the electric field at a distance \(2 r\) on the equatorial line from the mid-point of dipole. Then, the value of \(x\) isAP EAMCET 2018 Easy
- If the length of an antenna is \(150 \mathrm{~cm}\), the transmission frequency is ____ \(\mathrm{MHz}\). (Speed of light in vacuum \(=3 \times 10^8 \mathrm{~ms}^{-1}\))AP EAMCET 2017 Easy
- The elements with metallic nature in the following are C, Si, Ge, Sn, \(\mathrm{Pb}\)AP EAMCET 2023 Easy
- Two square shaped metal plates of side \(1 \mathrm{~m}\), kept \(0.01 \mathrm{~m}\) apart in air form a parallel plate capacitor. It is connected to a battery of \(500 \mathrm{~V}\). The plates of the capacitor are then immersed in an insulting oil by lowering the plates vertically with a speed of \(0.001 \mathrm{~ms}^{-1}\). If the dielectric constant of the oil is 11 , then current drawn from the battery during this process isAP EAMCET 2023 Hard
- If thenAP EAMCET 2021 Easy
- A car takes a round turn of radius with a velocity of . The centripetal force acting on the car isAP EAMCET 2021 Easy