Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
COMEDK2014PhysicsSemiconductors

Two amplifiers are connected one after the other in series (cascaded). The first amplifier has a voltage gain of 10 and the second has a voltage gain of 20 . If the input signal is 0.01 ~V , what is the output AC signal?

Options

  1. A1.5 ~V
  2. B2 ~V
  3. C2.5 ~V
  4. D3.0 ~V

Correct answer

B. 2 ~V

Step-by-step solution

Voltage gain of first amplifier, A₁=10 Voltage gain of second amplifier, A₂=20 Input signal voltage, V_ i =0.01 ~V Total voltage gain, when two amplifiers are connected in series (cascaded), is given as A=A₁ A₂=10 20=200 We know that, voltage gain aligned A &= output voltage (V_ o ) input voltage (V_ i ) 200 &= V_ o 0.01 V_ o &=200 0.01=2 ~V aligned

Practice Semiconductors on Quantrex Academy →

More from Semiconductors

Pick out the correct statement from the following; 2026What is the minimum wavelength of radiation required to detect a p-n junction diode made of a semiconductor having band gap 3.3 eV. [Planck's constant h = 6.6 10³⁴ J.s ] 2026Genetic Engineering is related to the principle of 2026A silicon sample is doped simultaneously with donor impurity phosphorus at a concentration of N_D = 3 10²² m⁻³ and acceptor impurity boron at a concentration of N_D = 2.8 10²² m⁻³ 2026In a PN junction diode, the forward bias is increased gradually from 0 Volt to 1 Volt. Which of the following statements is correct? 2026In the circuit given, the reverse breakdown voltage of the Zener diode is 4.8 V. The current through the Zener and the power dissipation in Zener is: 2026An n-type and p-type semiconductor can be obtained by respectively doping pure silicon with 2026In which of the following figures, diode is reverse biased? 2026 Full Semiconductors list All COMEDK PYQs