Year 2024

Week # 3 Quiz 3

Q1. An amplifier without feedback has a voltage gain of 40, input resistance of \(2.5\:K\Omega\) & Output resistance of \(1\:K\Omega\). The input resistance and output resistance of the voltage-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.5 is

Q2. In the differential voltage gain & the common mode voltage gain of a differential amplifierare 48db & 2db respectively, then its common mode rejection ratio is

Q3. A differential amplifier has a differential gain of 20,000. CMRR=80 dB. The common mode gain is

Q4. Under low level injection assumption, the injected minority carrier current for an extrinsic semiconductor is essentially the

Q5. If the \(f_T\) of a transistor use in a certain amplifier is 75 MHz and the bandwidth is 10 MHz, the voltage gain must be

Q6. A non-triggerable monostable multivibrator has \(R_{ext} = 10\: K\Omega\) and \(C_{ext} = 0.01 \:\mu F\). It’s pulse-width will be

Q7. Current flow in a semiconductors depends on the phenomenon of

Q8. In a bipolar transistor, the base collector junction has

Q9. A half wave rectifier circuit with capacitive filter is connected to 200V, 50 Hz ac line the output voltage across the capacitor should be approximately

Q10. Choose the correct match for input resistance of various amplifier configurations shown below: $$\begin{array} {|r|r|}\hline CB : Common\: Base & LO : Low \\ \hline CC : Common \:Collector & MO : Moderate \\ \hline CE : Common\: Emitter & HI : High \\ \hline \end{array}$$