A transistor is used in an amplifier circuit in common emitter mode. If the best current changes by 100 $μ A,$ it brings a change of 10 mA is collector current. If the load resistance is 2 $k Ω$ and input resistance is 1 $k Ω,$ the value of power gain is x * 10⁴. The value of x is_____________.

3 Views|Posted 6 months ago

Asked by Shiksha User

1 Answer

Sort by:

Answered by

Alok Kumar Singh | Contributor-Level 10

6 months ago

Power gain = ${(\frac{Δ i_{c}}{Δ i_{b}})}^{2} * \frac{R_{0}}{R_{i}}$

= ${(\frac{10 * 1 0^{- 3}}{100 * 1 0^{- 6}})}^{2} * \frac{2}{1}$

= 2 * 104 = x * 104

= 2

Upvote

Similar Questions for you

Two 10cm log, straight wires, each carrying a current of 5A are kept parallel to each other. If each wire experienced a force of 10^-5N, then separation between the wires is__________cm.

Vishal Baghel

$F = \frac{μ_{0} \times 2}{4 π} \frac{i_{1} i_{2}}{d} l$

$1 0^{- 5} = \frac{1 0^{- 7} \times 2 \times 5 \times 5}{d} = \frac{10}{100}$

$d = 5 \times 1 0^{- 2} m$

d = 5 cm

The positive feedback is required by an amplifier to act an oscillator. The feedback here means:

Vishal Baghel

A portion of the output power is returned back to the input.

The variation of acceleration due to gravity (g) with distance (r) from the centre of the earth is correctly represented by: (Given R = radius of earth)

Payal Gupta

$g \propto r 0 \leq r \leq R$

$g \propto \frac{1}{r^{2}} r > R$

Alok Kumar Singh

Voltage gain = $\frac{Δ l_{C}}{Δ l_{B}} \times \frac{R_{C}}{R_{B}}$

$\frac{5 \times 1 0^{- 3}}{100 \times 1 0^{- 6}} \times \frac{2}{0.5}$

= 200

The zener diode has a V_z = 30V. The current passing through the diode for the following circuit is…………mA.

Payal Gupta

$l = \frac{90 ? 30}{4000} = 15 m A$

$I_{1} = \frac{30}{5000} = 6 m A & l_{2} = 9 m A$

Taking an Exam? Selecting a College?

Get authentic answers from experts, students and alumni that you won't find anywhere else.

On Shiksha, get access to

66K

Colleges

1.2K

Exams

6.8L

Reviews

1.8M

Answers

Learn more about...

Physics NCERT Exemplar Solutions Class 12th Chapter Fourteen 2025

View Exam Details

Share Your College Life Experience

Didn't find the answer you were looking for?

Search from Shiksha's 1 lakh+ Topics

Ask Current Students, Alumni & our Experts

Quick Actions

Community GuidelinesUser Points System

QuestionsDiscussionsTags

Have a question related to your career & education?

See what others like you are asking & answering

A transistor is used in an amplifier circuit in common emitter mode. If the best current changes by 100 μ A , it brings a change of 10 mA is collector current. If the load resistance is 2 k Ω and input resistance is 1 k Ω , the value of power gain is x * 104. The value of x is_____________.