In an n-p-n transistor circuit,the collector | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) Given: Collector current $I_C = 20 \, mA$. Since $90 \%$ of the emitted electrons reach the collector,the current gain factor $\alpha = \frac{I_C}

Vedclass · Accepted Answer

emitter current will be $22.2 \, mA$

Vedclass · Answer

(B) Given: Collector current $I_C = 20 \, mA$. Since $90 \%$ of the emitted electrons reach the collector,the current gain factor $\alpha = \frac{I_C}{I_E} = 0.90$. Using the relation $I_C = \alpha I_E$,we find the emitter current: $I_E = \frac{I_C}{\alpha} = \frac{20 \, mA}{0.90} = 22.22 \, mA$. Using the relation $I_E = I_C + I_B$,we find the base current: $I_B = I_E - I_C = 22.22 \, mA - 20 \, mA = 2.22 \, mA$. Comparing with the given options,the emitter current is $22.2 \, mA$.

In an $n-p-n$ transistor circuit,the collector current is $20 \, mA$. If $90 \%$ of the emitted electrons reach the collector,calculate the emitter current and base current.

Similar Questions

In the given transistor circuit,the base current is $35 \ \mu A$. If the value of $V_{BE}$ is negligible,what is the value of $R_b$ in $k\Omega$?

If $ \alpha $-current gain of a transistor is $ 0.98 $,what is the value of $ \beta $-current gain of the transistor?

In the figure,given that $V_{BB}$ supply can vary from $0$ to $5.0 \,V$,$V_{CC} = 5\,V$,$\beta_{dc} = 200$,$R_B = 100\,k\Omega$,$R_C = 1\,k\Omega$ and $V_{BE} = 1.0\,V$. The minimum base current and the input voltage at which the transistor will go to saturation,will be respectively:

In the case of constants $\alpha$ and $\beta$ of a transistor:

For a $CE$ transistor amplifier,the audio signal voltage across the collector resistance of $2 \, k\Omega$ is $4 \, V$. If the current amplification factor $(\beta)$ of the transistor is $100$ and the base resistance is $1 \, k\Omega$,then the input signal voltage is ....... $mV$.

Vedclass Test Series

Exam Paper Generator

Online Exam Module