Quiz

Q1. Find the output voltage in the following circuit:

Q2. If \(\alpha = 0.98\) , \(I_{C} = 5 \: mA\) and \(I_B = 100\: \mu A\) for a transistor, then the value of \(I_{CO}\) will be

Q3. An amplifier without feedback has a voltage gain of 100, input resistance of \(10\:K\Omega\) & Output resistance of \(3\:K\Omega\). The input resistance and output resistance of the voltage-series negative feedback amplifier using the above amplifier with a feedback factor of 0.6 is

Q4. In the circuit shown below, the knee current of the ideal zener diode is 10 mA. To maintain 5 V across \(R_L\), the minimum value of \(R_L\) in ohm and the maximum power rating of the zener diode in mW respectively are

Q5. An amplifier without feedback has a voltage gain of 50, input resistance of \(3.5\:K\Omega\) & Output resistance of \(1.5\:K\Omega\). The input resistance of the voltage-shunt negative feedback amplifier using the above amplifier with a feedback factor of 0.7 is

Q6. An Op amp has an open-loop gain of \(10^5\)and an open loop upper cut-off frequency of 10 Hz. If this Op amp is connected as an amplifier with a closed loop gain of 100, then the new upper cut-off frequency is

Q7. In a bipolar transistor, the base collector junction has

Q8. A differential amplifier has an open circuit voltage gain of 100. The input signals are 3.35 V and 3.25 V. Determine the output voltage.

Q9. Which among the following is the most widely used constant-gain amplifier circuit?

Q10. Identify the filter zone in the given circuit diagram.