NEET Physics MCQs

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

A CE transistor amplifier has a collector resistance of $5\,k\Omega$ and a base resistance of $2k\Omega$. If the input signal voltage is $10mV$ and the current amplification factor is 50, what is the output voltage across the collector resistance?

The voltage gain of a CE transistor amplifier is 200. If the collector resistance is $4\,k\Omega$ and the base resistance is $1\,k\Omega$, what is the current amplification factor ($\beta$) of the transistor?

In a CE amplifier, if the base resistance is doubled while keeping the collector resistance and input voltage constant, how does the output voltage change?

A CE amplifier has $R_C = 10k\Omega$, $R_B = 2k\Omega$, and $\beta = 100$. If the desired output voltage is $2V$, what input voltage should be applied?

For a common emitter amplifier, the audio signal voltage across the collector resistance 2k ${\rm{\Omega }}$ is 2 V. If the current amplification factor of the transistor is 220, and the base resistance is 1.5 ${\rm{\Omega }}$, the input signal voltage and base current are

In NPN transistor, ${10^{10}}$ electrons enter in emitter region in ${10^{ - 6}}s.$ If 2% electrons are lost in base region then collector current and current amplification factor $\left( \beta \right)$ respectively are

In a NPN transistor, 108 electrons enter the emitter in ${10^{ - 8}}s$. If 1% electrons are lost in the base, the fraction of current that enters the collector and current amplification factor are respectively

If ${\rm{\alpha \;and\;\beta }}$ are the collector emitter short circuit current amplification factor and collector base short circuit current amplification factor respectively of a transistor then ${\rm{\alpha }}$ is equal to

If ${\rm{\alpha \;and\;\beta }}$ are the collector emitter short circuit current amplification factor and collector base short circuit current amplification factor respectively of a transistor then ${\rm{\alpha }}$ is equal to