Question:
The current gain of a common emitter amplifier is $69$ . If the emitter current is $7.0 \,mA$, collector current is :
The current gain of a common emitter amplifier is $69$ . If the emitter current is $7.0 \,mA$, collector current is :
Updated On: Apr 28, 2025
- 9.6 mA
- 6.9 mA
- 0.69 mA
- 69 mA
Hide Solution
Verified By Collegedunia
The Correct Option is B
Solution and Explanation
$\beta=69=\frac{I_{C}}{I_{B}}$
$\alpha=\frac{\beta}{1+\beta}=\frac{69}{70}=\frac{I_{C}}{I_{E}}$
$I_{C}=I_{E}\times\frac{69}{70}$
$=\frac{69}{70}\times7$
$=6.9$ mA
Was this answer helpful?
0
0
Top Questions on P-N Junction
- If a p-n junction diode is forward biased, then:
- KEAM - 2025
- Physics
- P-N Junction
- When a potential difference V is applied across a wire of resistance R, it dissipates energy at a rate W. If the wire is cut into two halves and these halves are connected mutually parallel across the same supply, the same supply, the energy dissipation rate will become:
- JEE Main - 2024
- Physics
- P-N Junction
- Consider the following statements A and B and identify the correct answer:
A. For a solar-cell, the I-V characteristics lies in the IV quadrant of the given graph.
B. In a reverse biased pn junction diode, the current measured in (µA), is due to majority charge carriers.- NEET (UG) - 2024
- Physics
- P-N Junction
The following are the graphs of potential barrier versus width of the depletion region for a p-n junction diode.
Which of the following is correct?
- COMEDK UGET - 2024
- Physics
- P-N Junction
- A p-n junction diode is connected to a battery of emf 5.7 V in series with a resistor 5k \( \Omega \) such that it is forward biased. If the barrier potential of the diode is 0.7 V, neglecting the diode resistance, the current in the circuit is
- KCET - 2024
- Physics
- P-N Junction
View More Questions
Questions Asked in JEE Main exam
- Let \( A = [a_{ij}] \) be a matrix of order 3 \(\times\) 3, with \(a_{ij} = (\sqrt{2})^{i+j}\). If the sum of all the elements in the third row of \( A^2 \) is \( \alpha + \beta\sqrt{2} \), where \(\alpha, \beta \in \mathbb{Z}\), then \(\alpha + \beta\) is equal to:
- JEE Main - 2025
- Matrices and Determinants
Consider the following sequence of reactions :
Molar mass of the product formed (A) is ______ g mol\(^{-1}\).- JEE Main - 2025
- Organic Chemistry
The magnitude of heat exchanged by a system for the given cyclic process ABC (as shown in the figure) is (in SI units):
- JEE Main - 2025
- Electric charges and fields
- The value of \( (\sin 70^\circ)(\cot 10^\circ \cot 70^\circ - 1) \) is:
- JEE Main - 2025
- Trigonometric Identities
- The number of 6-letter words, with or without meaning, that can be formed using the letters of the word "MATHS" such that any letter that appears in the word must appear at least twice is:
- JEE Main - 2025
- Calculus
View More Questions
Concepts Used:
P-n Junction
A P-N junction is an interface or a boundary between two semiconductor material types, namely the p-type and the n-type, inside a semiconductor.
Biasing conditions for the p-n Junction Diode:
in p-n junction diode two operating regions are there:
- P-type
- N-type
There are three biasing conditions for p-n junction diode are as follows:
- Zero bias: When there is no external voltage applied to the p-n junction diode.
- Forward bias: P-type is connected to positive terminal of the voltage potential while n-type is connected to the negative terminal.
- Reverse bias: P-type is connected to negative terminal of the voltage potential while n-type is connected to the positive terminal.